diff --git a/extensions/compilecoffee/compile-coffee.coffee b/extensions/compilecoffee/compile-coffee.coffee
index e4ca264c8..4dd7b0992 100644
--- a/extensions/compilecoffee/compile-coffee.coffee
+++ b/extensions/compilecoffee/compile-coffee.coffee
@@ -7,7 +7,7 @@ Extension = require 'extension'
 
 module.exports =
 class CompileCoffee extends Editor
-  window.resourceTypes.push this
+  atom.router.add this
 
   running: true
 
diff --git a/extensions/docs/docs.coffee b/extensions/docs/docs.coffee
index cb8ba1b2f..d382e55df 100644
--- a/extensions/docs/docs.coffee
+++ b/extensions/docs/docs.coffee
@@ -6,7 +6,7 @@ Browser = require 'browser'
 
 module.exports =
 class Docs extends Browser
-  window.resourceTypes.push this
+  atom.router.add this
 
   running: true
 
diff --git a/extensions/findinproject/find-in-project.coffee b/extensions/findinproject/find-in-project.coffee
index 6009b2da2..90d04ebcc 100644
--- a/extensions/findinproject/find-in-project.coffee
+++ b/extensions/findinproject/find-in-project.coffee
@@ -10,7 +10,7 @@ ModalSelector = require 'modal-selector'
 
 module.exports =
 class FindInProject extends Browser
-  window.resourceTypes.push this
+  atom.router.add this
 
   running: true
 
diff --git a/extensions/gist/gist.coffee b/extensions/gist/gist.coffee
index 64a278366..8ef729c38 100644
--- a/extensions/gist/gist.coffee
+++ b/extensions/gist/gist.coffee
@@ -10,7 +10,7 @@ Base64 = require 'gist/base64'
 
 module.exports =
 class Gist extends Editor
-  window.resourceTypes.push this
+  atom.router.add this
 
   settings:
     username: ''
diff --git a/extensions/markdownpreview/markdownpreview.coffee b/extensions/markdownpreview/markdownpreview.coffee
index c1dddf818..9798e71a7 100644
--- a/extensions/markdownpreview/markdownpreview.coffee
+++ b/extensions/markdownpreview/markdownpreview.coffee
@@ -9,7 +9,7 @@ converter  = new Showdown.converter
 
 module.exports =
 class Markdownpreview extends Browser
-  window.resourceTypes.push this
+  atom.router.add this
 
   running: true
 
diff --git a/extensions/showkeybindings/showkeybindings.coffee b/extensions/showkeybindings/showkeybindings.coffee
index 913e0db40..f4bdacbcd 100644
--- a/extensions/showkeybindings/showkeybindings.coffee
+++ b/extensions/showkeybindings/showkeybindings.coffee
@@ -6,7 +6,7 @@ Browser = require 'browser'
 
 module.exports =
 class Showkeybindings extends Browser
-  window.resourceTypes.push this
+  atom.router.add this
 
   constructor: ->
     @running = true
diff --git a/src/atom/browser.coffee b/src/atom/browser.coffee
index b82424b18..019ef32a7 100644
--- a/src/atom/browser.coffee
+++ b/src/atom/browser.coffee
@@ -6,7 +6,7 @@ Resource = require 'resource'
 #   browser:close (browser) -> Called when a browser is closed.
 module.exports =
 class Browser extends Resource
-  window.resourceTypes.push this
+  atom.router.add this
 
   open: (url) ->
     return false if not /^https?:/.test url
diff --git a/src/atom/editor.coffee b/src/atom/editor.coffee
index 4af15063c..073928b92 100644
--- a/src/atom/editor.coffee
+++ b/src/atom/editor.coffee
@@ -12,7 +12,7 @@ EditorPane = require 'editor-pane'
 #   editor:close (editor) -> Called when an editor is closed.
 module.exports =
 class Editor extends Resource
-  window.resourceTypes.push this
+  atom.router.add this
 
   dirty: false
 
diff --git a/src/atom/project.coffee b/src/atom/project.coffee
index bbbab0a5f..58f763655 100644
--- a/src/atom/project.coffee
+++ b/src/atom/project.coffee
@@ -14,7 +14,7 @@ Resource = require 'resource'
 #     in a project.
 module.exports =
 class Project extends Resource
-  window.resourceTypes.push this
+  atom.router.add this
 
   settings:
     # Regexp used to ignore paths.
@@ -54,17 +54,11 @@ class Project extends Resource
         @setActiveResource resource
         resource.show()
         true
-      else
-        # Try to open all others
-        for resourceType in window.resourceTypes
-          resource = new resourceType
-          break if success = resource.open url
-
-        if success
-          @resources[url] = resource
-          atom.trigger 'project:resource:open', this, resource
-          @setActiveResource resource
-          true
+      else if resource = atom.router.open url
+        @resources[url] = resource
+        atom.trigger 'project:resource:open', this, resource
+        @setActiveResource resource
+        true
 
   close: (url) ->
     if url
diff --git a/src/atom/router.coffee b/src/atom/router.coffee
new file mode 100644
index 000000000..c90bf24de
--- /dev/null
+++ b/src/atom/router.coffee
@@ -0,0 +1,15 @@
+module.exports =
+class Router
+  resources: []
+
+  add: (resource) ->
+    @resources.unshift resource
+
+  open: (url) ->
+    success = false
+
+    for resourceType in @resources
+      resource = new resourceType
+      break if success = resource.open url
+
+    resource if success
diff --git a/src/atom/window.coffee b/src/atom/window.coffee
index d47e60949..b2ee1a2b7 100644
--- a/src/atom/window.coffee
+++ b/src/atom/window.coffee
@@ -7,19 +7,13 @@ _ = require 'underscore'
 # Events:
 #   window:load - Same as window.onLoad. Final event of app startup.
 windowAdditions =
-  resourceTypes: []
-
   url: $atomController.url?.toString()
 
   startup: ->
     atom.trigger 'window:load', this
 
-    success = false
-    for resourceType in @resourceTypes.reverse()
-      @resource = new resourceType
-      break if success = @resource.open @url
-
-    throw "I DON'T KNOW ABOUT #{@url}" if not success
+    if not @resource = atom.router.open @url
+      throw "I DON'T KNOW ABOUT #{@url}"
 
   shutdown: ->
     $atomController.close
diff --git a/src/startup.coffee b/src/startup.coffee
index a15470430..d5610863b 100644
--- a/src/startup.coffee
+++ b/src/startup.coffee
@@ -4,14 +4,11 @@ require 'window'
 window.atom = {}
 
 App = require 'app'
-Browser = require 'browser'
-Editor = require 'editor'
 Event = require 'event'
 ExtensionManager = require 'extension-manager'
 KeyBinder = require 'key-binder'
 Native = require 'native'
-Project = require 'project'
-Resource = require 'resource'
+Router = require 'router'
 Settings = require 'settings'
 Storage = require 'storage'
 
@@ -23,8 +20,13 @@ for name, method of atom.event
 atom.native = new Native
 atom.storage = new Storage
 atom.keybinder = new KeyBinder
+atom.router = new Router
 atom.settings = new Settings
 
+Browser = require 'browser'
+Editor = require 'editor'
+Project = require 'project'
+
 atom.extensions = {}
 atom.extensionManager = new ExtensionManager