diff --git a/data/palettes/a64.gpl b/data/extensions/arne-palettes/a64.gpl
similarity index 100%
rename from data/palettes/a64.gpl
rename to data/extensions/arne-palettes/a64.gpl
diff --git a/data/palettes/arne-paldac.gpl b/data/extensions/arne-palettes/arne-paldac.gpl
similarity index 100%
rename from data/palettes/arne-paldac.gpl
rename to data/extensions/arne-palettes/arne-paldac.gpl
diff --git a/data/palettes/arne16.gpl b/data/extensions/arne-palettes/arne16.gpl
similarity index 100%
rename from data/palettes/arne16.gpl
rename to data/extensions/arne-palettes/arne16.gpl
diff --git a/data/palettes/arne32.gpl b/data/extensions/arne-palettes/arne32.gpl
similarity index 100%
rename from data/palettes/arne32.gpl
rename to data/extensions/arne-palettes/arne32.gpl
diff --git a/data/palettes/cg-arne.gpl b/data/extensions/arne-palettes/cg-arne.gpl
similarity index 100%
rename from data/palettes/cg-arne.gpl
rename to data/extensions/arne-palettes/cg-arne.gpl
diff --git a/data/palettes/copper-tech.gpl b/data/extensions/arne-palettes/copper-tech.gpl
similarity index 100%
rename from data/palettes/copper-tech.gpl
rename to data/extensions/arne-palettes/copper-tech.gpl
diff --git a/data/palettes/cpc-boy.gpl b/data/extensions/arne-palettes/cpc-boy.gpl
similarity index 100%
rename from data/palettes/cpc-boy.gpl
rename to data/extensions/arne-palettes/cpc-boy.gpl
diff --git a/data/palettes/eroge-copper.gpl b/data/extensions/arne-palettes/eroge-copper.gpl
similarity index 100%
rename from data/palettes/eroge-copper.gpl
rename to data/extensions/arne-palettes/eroge-copper.gpl
diff --git a/data/palettes/jmp.gpl b/data/extensions/arne-palettes/jmp.gpl
similarity index 100%
rename from data/palettes/jmp.gpl
rename to data/extensions/arne-palettes/jmp.gpl
diff --git a/data/extensions/arne-palettes/package.json b/data/extensions/arne-palettes/package.json
new file mode 100644
index 000000000..11ac832fc
--- /dev/null
+++ b/data/extensions/arne-palettes/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "arne-palettes",
+  "displayName": "Arne Niklas Jansson Palettes",
+  "version": "1.0",
+  "author": { "name": "Arne Niklas Jansson", "url": "https://androidarts.com/" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "a64", "path": "./a64.gpl" },
+      { "id": "arne-paldac", "path": "./arne-paldac.gpl" },
+      { "id": "arne16", "path": "./arne16.gpl" },
+      { "id": "arne32", "path": "./arne32.gpl" },
+      { "id": "cg-arne", "path": "./cg-arne.gpl" },
+      { "id": "copper-tech", "path": "./copper-tech.gpl" },
+      { "id": "cpc-boy", "path": "./cpc-boy.gpl" },
+      { "id": "eroge-copper", "path": "./eroge-copper.gpl" },
+      { "id": "jmp", "path": "./jmp.gpl" },
+      { "id": "psygnork", "path": "./psygnork.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/psygnork.gpl b/data/extensions/arne-palettes/psygnork.gpl
similarity index 100%
rename from data/palettes/psygnork.gpl
rename to data/extensions/arne-palettes/psygnork.gpl
diff --git a/data/palettes/matriax8c.gpl b/data/extensions/davitmasia-palettes/matriax8c.gpl
similarity index 100%
rename from data/palettes/matriax8c.gpl
rename to data/extensions/davitmasia-palettes/matriax8c.gpl
diff --git a/data/extensions/davitmasia-palettes/package.json b/data/extensions/davitmasia-palettes/package.json
new file mode 100644
index 000000000..dfdfeacfe
--- /dev/null
+++ b/data/extensions/davitmasia-palettes/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "davitmasia-palettes",
+  "displayName": "Davit Masia Palettes",
+  "description": "Palettes contributed by Davit Masia",
+  "version": "1.0",
+  "author": { "name": "Davit Masia", "url": "https://twitter.com/DavitMasia" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "matriax8c", "path": "./matriax8c.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/db16.gpl b/data/extensions/dawnbringer-palettes/db16.gpl
similarity index 100%
rename from data/palettes/db16.gpl
rename to data/extensions/dawnbringer-palettes/db16.gpl
diff --git a/data/palettes/db32.gpl b/data/extensions/dawnbringer-palettes/db32.gpl
similarity index 100%
rename from data/palettes/db32.gpl
rename to data/extensions/dawnbringer-palettes/db32.gpl
diff --git a/data/extensions/dawnbringer-palettes/package.json b/data/extensions/dawnbringer-palettes/package.json
new file mode 100644
index 000000000..e68dd8b6f
--- /dev/null
+++ b/data/extensions/dawnbringer-palettes/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "dawnbringer-palettes",
+  "displayName": "Richard \"DawnBringer\" Fhager Palettes",
+  "description": "Palettes created by Richard \"DawnBringer\" Fhager",
+  "version": "1.0",
+  "author": { "name": "Richard Fhager", "url": "http://hem.fyristorg.com/dawnbringer/" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "db16", "path": "./db16.gpl" },
+      { "id": "db32", "path": "./db32.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/arq4.gpl b/data/extensions/endesga-palettes/arq4.gpl
similarity index 100%
rename from data/palettes/arq4.gpl
rename to data/extensions/endesga-palettes/arq4.gpl
diff --git a/data/palettes/edg16.gpl b/data/extensions/endesga-palettes/edg16.gpl
similarity index 100%
rename from data/palettes/edg16.gpl
rename to data/extensions/endesga-palettes/edg16.gpl
diff --git a/data/palettes/edg32.gpl b/data/extensions/endesga-palettes/edg32.gpl
similarity index 100%
rename from data/palettes/edg32.gpl
rename to data/extensions/endesga-palettes/edg32.gpl
diff --git a/data/palettes/edg8.gpl b/data/extensions/endesga-palettes/edg8.gpl
similarity index 100%
rename from data/palettes/edg8.gpl
rename to data/extensions/endesga-palettes/edg8.gpl
diff --git a/data/palettes/en4.gpl b/data/extensions/endesga-palettes/en4.gpl
similarity index 100%
rename from data/palettes/en4.gpl
rename to data/extensions/endesga-palettes/en4.gpl
diff --git a/data/palettes/enos16.gpl b/data/extensions/endesga-palettes/enos16.gpl
similarity index 100%
rename from data/palettes/enos16.gpl
rename to data/extensions/endesga-palettes/enos16.gpl
diff --git a/data/extensions/endesga-palettes/package.json b/data/extensions/endesga-palettes/package.json
new file mode 100644
index 000000000..faa0dbcf8
--- /dev/null
+++ b/data/extensions/endesga-palettes/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "endesga-palettes",
+  "displayName": "ENDESGA Studios Palettes",
+  "description": "Palettes contributed by ENDESGA Studios",
+  "version": "1.0",
+  "author": { "name": "ENDESGA Studios", "url": "https://twitter.com/ENDESGA" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "arq4", "path": "./arq4.gpl" },
+      { "id": "edg16", "path": "./edg16.gpl" },
+      { "id": "edg32", "path": "./edg32.gpl" },
+      { "id": "edg8", "path": "./edg8.gpl" },
+      { "id": "en4", "path": "./en4.gpl" },
+      { "id": "enos16", "path": "./enos16.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/apple-ii.gpl b/data/extensions/hardware-palettes/apple-ii.gpl
similarity index 100%
rename from data/palettes/apple-ii.gpl
rename to data/extensions/hardware-palettes/apple-ii.gpl
diff --git a/data/palettes/atari2600-ntsc.gpl b/data/extensions/hardware-palettes/atari2600-ntsc.gpl
similarity index 100%
rename from data/palettes/atari2600-ntsc.gpl
rename to data/extensions/hardware-palettes/atari2600-ntsc.gpl
diff --git a/data/palettes/atari2600-pal.gpl b/data/extensions/hardware-palettes/atari2600-pal.gpl
similarity index 100%
rename from data/palettes/atari2600-pal.gpl
rename to data/extensions/hardware-palettes/atari2600-pal.gpl
diff --git a/data/palettes/cga.gpl b/data/extensions/hardware-palettes/cga.gpl
similarity index 100%
rename from data/palettes/cga.gpl
rename to data/extensions/hardware-palettes/cga.gpl
diff --git a/data/palettes/cga0.gpl b/data/extensions/hardware-palettes/cga0.gpl
similarity index 100%
rename from data/palettes/cga0.gpl
rename to data/extensions/hardware-palettes/cga0.gpl
diff --git a/data/palettes/cga0hi.gpl b/data/extensions/hardware-palettes/cga0hi.gpl
similarity index 100%
rename from data/palettes/cga0hi.gpl
rename to data/extensions/hardware-palettes/cga0hi.gpl
diff --git a/data/palettes/cga1.gpl b/data/extensions/hardware-palettes/cga1.gpl
similarity index 100%
rename from data/palettes/cga1.gpl
rename to data/extensions/hardware-palettes/cga1.gpl
diff --git a/data/palettes/cga1hi.gpl b/data/extensions/hardware-palettes/cga1hi.gpl
similarity index 100%
rename from data/palettes/cga1hi.gpl
rename to data/extensions/hardware-palettes/cga1hi.gpl
diff --git a/data/palettes/cga3rd.gpl b/data/extensions/hardware-palettes/cga3rd.gpl
similarity index 100%
rename from data/palettes/cga3rd.gpl
rename to data/extensions/hardware-palettes/cga3rd.gpl
diff --git a/data/palettes/cga3rdhi.gpl b/data/extensions/hardware-palettes/cga3rdhi.gpl
similarity index 100%
rename from data/palettes/cga3rdhi.gpl
rename to data/extensions/hardware-palettes/cga3rdhi.gpl
diff --git a/data/palettes/commodore-plus4.gpl b/data/extensions/hardware-palettes/commodore-plus4.gpl
similarity index 100%
rename from data/palettes/commodore-plus4.gpl
rename to data/extensions/hardware-palettes/commodore-plus4.gpl
diff --git a/data/palettes/commodore-vic20.gpl b/data/extensions/hardware-palettes/commodore-vic20.gpl
similarity index 100%
rename from data/palettes/commodore-vic20.gpl
rename to data/extensions/hardware-palettes/commodore-vic20.gpl
diff --git a/data/palettes/commodore64.gpl b/data/extensions/hardware-palettes/commodore64.gpl
similarity index 100%
rename from data/palettes/commodore64.gpl
rename to data/extensions/hardware-palettes/commodore64.gpl
diff --git a/data/palettes/cpc.gpl b/data/extensions/hardware-palettes/cpc.gpl
similarity index 100%
rename from data/palettes/cpc.gpl
rename to data/extensions/hardware-palettes/cpc.gpl
diff --git a/data/palettes/gameboy-color-type1.gpl b/data/extensions/hardware-palettes/gameboy-color-type1.gpl
similarity index 100%
rename from data/palettes/gameboy-color-type1.gpl
rename to data/extensions/hardware-palettes/gameboy-color-type1.gpl
diff --git a/data/palettes/gameboy.gpl b/data/extensions/hardware-palettes/gameboy.gpl
similarity index 100%
rename from data/palettes/gameboy.gpl
rename to data/extensions/hardware-palettes/gameboy.gpl
diff --git a/data/palettes/master-system.gpl b/data/extensions/hardware-palettes/master-system.gpl
similarity index 100%
rename from data/palettes/master-system.gpl
rename to data/extensions/hardware-palettes/master-system.gpl
diff --git a/data/palettes/nes-ntsc.gpl b/data/extensions/hardware-palettes/nes-ntsc.gpl
similarity index 100%
rename from data/palettes/nes-ntsc.gpl
rename to data/extensions/hardware-palettes/nes-ntsc.gpl
diff --git a/data/palettes/nes.gpl b/data/extensions/hardware-palettes/nes.gpl
similarity index 100%
rename from data/palettes/nes.gpl
rename to data/extensions/hardware-palettes/nes.gpl
diff --git a/data/extensions/hardware-palettes/package.json b/data/extensions/hardware-palettes/package.json
new file mode 100644
index 000000000..4ff009d7d
--- /dev/null
+++ b/data/extensions/hardware-palettes/package.json
@@ -0,0 +1,36 @@
+{
+  "name": "harware-palettes",
+  "displayName": "Hardware Palettes",
+  "description": "Well-known palettes from old computer hardware",
+  "version": "1.0",
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "apple-ii", "path": "./apple-ii.gpl" },
+      { "id": "atari2600-ntsc", "path": "./atari2600-ntsc.gpl" },
+      { "id": "atari2600-pal", "path": "./atari2600-pal.gpl" },
+      { "id": "cga", "path": "./cga.gpl" },
+      { "id": "cga0", "path": "./cga0.gpl" },
+      { "id": "cga0hi", "path": "./cga0hi.gpl" },
+      { "id": "cga1", "path": "./cga1.gpl" },
+      { "id": "cga1hi", "path": "./cga1hi.gpl" },
+      { "id": "cga3rd", "path": "./cga3rd.gpl" },
+      { "id": "cga3rdhi", "path": "./cga3rdhi.gpl" },
+      { "id": "commodore-plus4", "path": "./commodore-plus4.gpl" },
+      { "id": "commodore-vic20", "path": "./commodore-vic20.gpl" },
+      { "id": "commodore64", "path": "./commodore64.gpl" },
+      { "id": "cpc", "path": "./cpc.gpl" },
+      { "id": "gameboy-color-type1", "path": "./gameboy-color-type1.gpl" },
+      { "id": "gameboy", "path": "./gameboy.gpl" },
+      { "id": "master-system", "path": "./master-system.gpl" },
+      { "id": "nes-ntsc", "path": "./nes-ntsc.gpl" },
+      { "id": "nes", "path": "./nes.gpl" },
+      { "id": "teletext", "path": "./teletext.gpl" },
+      { "id": "vga-13h", "path": "./vga-13h.gpl" },
+      { "id": "zx-spectrum", "path": "./zx-spectrum.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/teletext.gpl b/data/extensions/hardware-palettes/teletext.gpl
similarity index 100%
rename from data/palettes/teletext.gpl
rename to data/extensions/hardware-palettes/teletext.gpl
diff --git a/data/palettes/vga-13h.gpl b/data/extensions/hardware-palettes/vga-13h.gpl
similarity index 100%
rename from data/palettes/vga-13h.gpl
rename to data/extensions/hardware-palettes/vga-13h.gpl
diff --git a/data/palettes/zx-spectrum.gpl b/data/extensions/hardware-palettes/zx-spectrum.gpl
similarity index 100%
rename from data/palettes/zx-spectrum.gpl
rename to data/extensions/hardware-palettes/zx-spectrum.gpl
diff --git a/data/palettes/mail24.gpl b/data/extensions/hyohnoo-palettes/mail24.gpl
similarity index 100%
rename from data/palettes/mail24.gpl
rename to data/extensions/hyohnoo-palettes/mail24.gpl
diff --git a/data/extensions/hyohnoo-palettes/package.json b/data/extensions/hyohnoo-palettes/package.json
new file mode 100644
index 000000000..3e0fbd5ac
--- /dev/null
+++ b/data/extensions/hyohnoo-palettes/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "hyohnoo-palettes",
+  "displayName": "Hyohnoo Palettes",
+  "description": "Palettes contributed by Hyohnoo",
+  "version": "1.0",
+  "author": { "name": "Hyohnoo", "url": "https://twitter.com/Hyohnoo" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "mail24", "path": "./mail24.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/nyx8.gpl b/data/extensions/javierguerrero-palettes/nyx8.gpl
similarity index 100%
rename from data/palettes/nyx8.gpl
rename to data/extensions/javierguerrero-palettes/nyx8.gpl
diff --git a/data/extensions/javierguerrero-palettes/package.json b/data/extensions/javierguerrero-palettes/package.json
new file mode 100644
index 000000000..0ec1c37db
--- /dev/null
+++ b/data/extensions/javierguerrero-palettes/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "javierguerrero-palettes",
+  "displayName": "Javier Guerrero Palettes",
+  "description": "Palettes contributed by Javier Guerrero",
+  "version": "1.0",
+  "author": { "name": "Javier Guerrero", "url": "https://twitter.com/Xavier_Gd" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "nyx8", "path": "./nyx8.gpl" }
+    ]
+  }
+}
diff --git a/data/extensions/pico8-palette/package.json b/data/extensions/pico8-palette/package.json
new file mode 100644
index 000000000..435c73c72
--- /dev/null
+++ b/data/extensions/pico8-palette/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "pico8-palettes",
+  "displayName": "PICO-8 Palette",
+  "description": "Palettes from PICO-8 created by Joseph White",
+  "version": "1.0",
+  "author": { "name": "Joseph White", "url": "http://www.pico-8.com/" },
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "pico-8", "path": "./pico-8.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/pico-8.gpl b/data/extensions/pico8-palette/pico-8.gpl
similarity index 100%
rename from data/palettes/pico-8.gpl
rename to data/extensions/pico8-palette/pico-8.gpl
diff --git a/data/palettes/google-ui.gpl b/data/extensions/software-palettes/google-ui.gpl
similarity index 100%
rename from data/palettes/google-ui.gpl
rename to data/extensions/software-palettes/google-ui.gpl
diff --git a/data/palettes/monokai.gpl b/data/extensions/software-palettes/monokai.gpl
similarity index 100%
rename from data/palettes/monokai.gpl
rename to data/extensions/software-palettes/monokai.gpl
diff --git a/data/extensions/software-palettes/package.json b/data/extensions/software-palettes/package.json
new file mode 100644
index 000000000..d98c065bd
--- /dev/null
+++ b/data/extensions/software-palettes/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "software-palettes",
+  "displayName": "Software Palettes",
+  "description": "Well-known palettes from software developers",
+  "version": "1.0",
+  "publisher": "aseprite",
+  "categories": [
+    "Palettes"
+  ],
+  "contributes": {
+    "palettes": [
+      { "id": "google-ui", "path": "./google-ui.gpl" },
+      { "id": "monokai", "path": "./monokai.gpl" },
+      { "id": "smile-basic", "path": "./smile-basic.gpl" },
+      { "id": "solarized", "path": "./solarized.gpl" },
+      { "id": "web-safe-colors", "path": "./web-safe-colors.gpl" },
+      { "id": "win16", "path": "./win16.gpl" },
+      { "id": "x11", "path": "./x11.gpl" }
+    ]
+  }
+}
diff --git a/data/palettes/smile-basic.gpl b/data/extensions/software-palettes/smile-basic.gpl
similarity index 100%
rename from data/palettes/smile-basic.gpl
rename to data/extensions/software-palettes/smile-basic.gpl
diff --git a/data/palettes/solarized.gpl b/data/extensions/software-palettes/solarized.gpl
similarity index 100%
rename from data/palettes/solarized.gpl
rename to data/extensions/software-palettes/solarized.gpl
diff --git a/data/palettes/web-safe-colors.gpl b/data/extensions/software-palettes/web-safe-colors.gpl
similarity index 100%
rename from data/palettes/web-safe-colors.gpl
rename to data/extensions/software-palettes/web-safe-colors.gpl
diff --git a/data/palettes/win16.gpl b/data/extensions/software-palettes/win16.gpl
similarity index 100%
rename from data/palettes/win16.gpl
rename to data/extensions/software-palettes/win16.gpl
diff --git a/data/palettes/x11.gpl b/data/extensions/software-palettes/x11.gpl
similarity index 100%
rename from data/palettes/x11.gpl
rename to data/extensions/software-palettes/x11.gpl
diff --git a/src/app/extensions.cpp b/src/app/extensions.cpp
index 1e3adc196..1b85bacd8 100644
--- a/src/app/extensions.cpp
+++ b/src/app/extensions.cpp
@@ -113,6 +113,11 @@ std::string Extensions::themePath(const std::string& themeId)
   return std::string();
 }
 
+const std::map<std::string, std::string>& Extensions::palettes() const
+{
+  return m_palettes;
+}
+
 Extension* Extensions::loadExtension(const std::string& path,
                                      const std::string& fullPackageFilename,
                                      const bool isBuiltinExtension)
@@ -132,39 +137,46 @@ Extension* Extensions::loadExtension(const std::string& path,
 
   auto contributes = json["contributes"];
   if (contributes.is_object()) {
+    // Themes
     auto themes = contributes["themes"];
     if (themes.is_array()) {
       for (const auto& theme : themes.get_array()) {
-        auto jsonThemeId = theme.at("id");
-        auto jsonThemePath = theme.at("path");
+        std::string themeId = theme.at("id").get_string();
+        std::string themePath = theme.at("path").get_string();
 
-        if (!jsonThemeId.is_string()) {
-          LOG("EXT: A theme doesn't have 'id' property\n");
-        }
-        else if (!jsonThemePath.is_string()) {
-          LOG("EXT: Theme '%s' doesn't have 'path' property\n",
-              jsonThemeId.get_string().c_str());
+        // The path must be always relative to the extension
+        themePath = base::join_path(path, themePath);
+
+        LOG("EXT: New theme '%s' in '%s'\n",
+            themeId.c_str(),
+            themePath.c_str());
+
+        if (isBuiltinExtension) {
+          m_builtinThemes[themeId] = themePath;
         }
         else {
-          std::string themeId = jsonThemeId.get_string();
-          std::string themePath = jsonThemePath.get_string();
-
-          // The path must be always relative to the extension
-          themePath = base::join_path(path, themePath);
-
-          LOG("EXT: New theme '%s' in '%s'\n",
-              themeId.c_str(),
-              themePath.c_str());
-
-          if (isBuiltinExtension) {
-            m_builtinThemes[themeId] = themePath;
-          }
-          else {
-            m_userThemes[themeId] = themePath;
-          }
+          m_userThemes[themeId] = themePath;
         }
       }
     }
+
+    // Palettes
+    auto palettes = contributes["palettes"];
+    if (palettes.is_array()) {
+      for (const auto& palette : palettes.get_array()) {
+        std::string palId = palette.at("id").get_string();
+        std::string palPath = palette.at("path").get_string();
+
+        // The path must be always relative to the extension
+        palPath = base::join_path(path, palPath);
+
+        LOG("EXT: New palette '%s' in '%s'\n",
+            palId.c_str(),
+            palPath.c_str());
+
+        m_palettes[palId] = palPath;
+      }
+    }
   }
 
   return extension.release();
diff --git a/src/app/extensions.h b/src/app/extensions.h
index 7b29f27c9..3f3044bdf 100644
--- a/src/app/extensions.h
+++ b/src/app/extensions.h
@@ -67,6 +67,7 @@ namespace app {
     void installCompressedExtension(const std::string& zipFn);
 
     std::string themePath(const std::string& themeId);
+    const std::map<std::string, std::string>& palettes() const;
 
   private:
     Extension* loadExtension(const std::string& path,
@@ -78,6 +79,8 @@ namespace app {
     // Key=theme id, Value=theme path
     std::map<std::string, std::string> m_builtinThemes;
     std::map<std::string, std::string> m_userThemes;
+
+    std::map<std::string, std::string> m_palettes;
   };
 
 } // namespace app
diff --git a/src/app/res/palette_resource.h b/src/app/res/palette_resource.h
index bcc4adfff..d2e778468 100644
--- a/src/app/res/palette_resource.h
+++ b/src/app/res/palette_resource.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2015  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -18,17 +18,17 @@ namespace app {
 
   class PaletteResource : public Resource {
   public:
-    PaletteResource(doc::Palette* palette, const std::string& name)
-      : m_palette(palette)
-      , m_name(name) {
+    PaletteResource(const std::string& id, doc::Palette* palette)
+      : m_id(id)
+      , m_palette(palette) {
     }
     virtual ~PaletteResource() { }
+    virtual const std::string& id() const override { return m_id; }
     virtual doc::Palette* palette() { return m_palette; }
-    virtual const std::string& name() const override { return m_name; }
 
   private:
+    std::string m_id;
     doc::Palette* m_palette;
-    std::string m_name;
   };
 
 } // namespace app
diff --git a/src/app/res/palettes_loader_delegate.cpp b/src/app/res/palettes_loader_delegate.cpp
index b8eb65752..521710b1f 100644
--- a/src/app/res/palettes_loader_delegate.cpp
+++ b/src/app/res/palettes_loader_delegate.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2016  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -10,6 +10,8 @@
 
 #include "app/res/palettes_loader_delegate.h"
 
+#include "app/app.h"
+#include "app/extensions.h"
 #include "app/file/palette_file.h"
 #include "app/file_system.h"
 #include "app/res/palette_resource.h"
@@ -35,13 +37,19 @@ std::string PalettesLoaderDelegate::resourcesLocation() const
   return base::fix_path_separators(path);
 }
 
-Resource* PalettesLoaderDelegate::loadResource(const std::string& filename)
+const std::map<std::string, std::string>& PalettesLoaderDelegate::extensionResources() const
 {
-  doc::Palette* palette = load_palette(filename.c_str());
-  if (!palette)
-    return NULL;
+  return App::instance()->extensions().palettes();
+}
 
-  return new PaletteResource(palette, base::get_file_title(filename));
+Resource* PalettesLoaderDelegate::loadResource(const std::string& id,
+                                               const std::string& path)
+{
+  doc::Palette* palette = load_palette(path.c_str());
+  if (palette)
+    return new PaletteResource(id, palette);
+  else
+    return nullptr;
 }
 
 } // namespace app
diff --git a/src/app/res/palettes_loader_delegate.h b/src/app/res/palettes_loader_delegate.h
index e38a38fd9..202d6d1d6 100644
--- a/src/app/res/palettes_loader_delegate.h
+++ b/src/app/res/palettes_loader_delegate.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2015  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -16,7 +16,9 @@ namespace app {
   public:
     // ResourcesLoaderDelegate impl
     virtual std::string resourcesLocation() const override;
-    virtual Resource* loadResource(const std::string& filename) override;
+    virtual const std::map<std::string, std::string>& extensionResources() const override;
+    virtual Resource* loadResource(const std::string& id,
+                                   const std::string& path) override;
   };
 
 } // namespace app
diff --git a/src/app/res/resource.h b/src/app/res/resource.h
index 8853157ad..fa7bbb372 100644
--- a/src/app/res/resource.h
+++ b/src/app/res/resource.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2015  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -13,7 +13,7 @@ namespace app {
   class Resource {
   public:
     virtual ~Resource() { }
-    virtual const std::string& name() const = 0;
+    virtual const std::string& id() const = 0;
   };
 
 } // namespace app
diff --git a/src/app/res/resources_loader.cpp b/src/app/res/resources_loader.cpp
index 760f1d7d6..c1f839cf8 100644
--- a/src/app/res/resources_loader.cpp
+++ b/src/app/res/resources_loader.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2016  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -65,12 +65,27 @@ void ResourcesLoader::threadLoadResources()
   if (!item)
     return;
 
+  // Load resources from a fixed location
   FileItemList list = item->children();
   for (auto child : list) {
     if (m_cancel)
       break;
 
-    Resource* resource = m_delegate->loadResource((child)->fileName());
+    Resource* resource =
+      m_delegate->loadResource(base::get_file_title(child->fileName()),
+                               child->fileName());
+    if (resource)
+      m_queue.push(resource);
+  }
+
+  // Load resources from extensions
+  for (const auto& idAndPath : m_delegate->extensionResources()) {
+    if (m_cancel)
+      break;
+
+    Resource* resource =
+      m_delegate->loadResource(idAndPath.first,
+                               idAndPath.second);
     if (resource)
       m_queue.push(resource);
   }
diff --git a/src/app/res/resources_loader_delegate.h b/src/app/res/resources_loader_delegate.h
index bd535aefe..3ee29dcab 100644
--- a/src/app/res/resources_loader_delegate.h
+++ b/src/app/res/resources_loader_delegate.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2015  David Capello
+// Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -8,6 +8,7 @@
 #define APP_RES_RESOURCES_LOADER_DELEGATE_H_INCLUDED
 #pragma once
 
+#include <map>
 #include <string>
 
 namespace app {
@@ -18,7 +19,9 @@ namespace app {
   public:
     virtual ~ResourcesLoaderDelegate() { }
     virtual std::string resourcesLocation() const = 0;
-    virtual Resource* loadResource(const std::string& filename) = 0;
+    virtual const std::map<std::string, std::string>& extensionResources() const = 0;
+    virtual Resource* loadResource(const std::string& id,
+                                   const std::string& path) = 0;
   };
 
 } // namespace app
diff --git a/src/app/ui/resources_listbox.cpp b/src/app/ui/resources_listbox.cpp
index 52ee7b935..5ab66da9b 100644
--- a/src/app/ui/resources_listbox.cpp
+++ b/src/app/ui/resources_listbox.cpp
@@ -29,7 +29,7 @@ using namespace skin;
 // ResourceListItem
 
 ResourceListItem::ResourceListItem(Resource* resource)
-  : ListItem(resource->name()), m_resource(resource)
+  : ListItem(resource->id()), m_resource(resource)
 {
 }