diff --git a/contrib/react-rails/Gemfile b/contrib/react-rails/Gemfile
new file mode 100644
index 00000000000..d65e2a66952
--- /dev/null
+++ b/contrib/react-rails/Gemfile
@@ -0,0 +1,3 @@
+source 'http://rubygems.org'
+
+gemspec
diff --git a/contrib/react-rails/LICENSE b/contrib/react-rails/LICENSE
new file mode 100644
index 00000000000..261eeb9e9f8
--- /dev/null
+++ b/contrib/react-rails/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/contrib/react-rails/README.md b/contrib/react-rails/README.md
new file mode 100644
index 00000000000..b9eb9733451
--- /dev/null
+++ b/contrib/react-rails/README.md
@@ -0,0 +1,72 @@
+# React-Rails
+
+React/JSX adapter for the Ruby on Rails asset pipeline.
+
+## Installation
+
+React-Rails has only been tested with versions of Rails using `Gemfile`s. Use otherwise at your own risk.
+
+Add the following to your `Gemfile` and be sure to `bundle install` after. We suggest only adding the dependency to the `:assets` group so that if you precompile your assets, you aren't requiring extra gems unnecessarily.
+
+```ruby
+# Gemfile
+group :assets do
+  gem 'react-rails'
+end
+```
+
+
+## Usage
+
+### JSX
+
+To transform your JSX into JS, simply create `.jsx.js` files, and ensure that the file has the `/** @jsx React.DOM */` docblock.
+
+
+### React
+
+Since we don't put `react.js` into `assets/javascript`, you must explicitly include it. There are 2 ways to do this.
+
+You can `require` it in your manifest:
+
+```js
+// app/assets/application.js
+
+//= require react
+```
+
+Or you can include it explicitly as a separate script tag:
+
+```erb
+// app/views/layouts/application.erb.html
+<%= javascript_include_tag "react" %>
+```
+
+
+
+
+## Configuring
+
+There are 2 variants available. `:development` gives you the unminified version of React. This provides extra debugging and error prevention. `:production` gives you the minified version of React which strips out comments and helpful warnings, and minifies.
+
+```ruby
+# config/environments/development.rb
+MyApp::Application.configure do
+  config.react.variant = :development
+end
+
+# config/environments/production.rb
+MyApp::Application.configure do
+  config.react.variant = :production
+end
+```
+
+
+## TODO
+
+* [ ] Write tests
+* [ ] Ajax requests?
+* [ ] `somefile.jsx.erb.js`?
+* [ ] Consider removing the config entirely.
+* [ ] Do what jquery-rails is doing to intercept loads, instead of tmp dir magic
+* [ ] Build sample app
diff --git a/contrib/react-rails/VERSION b/contrib/react-rails/VERSION
new file mode 100644
index 00000000000..267577d47e4
--- /dev/null
+++ b/contrib/react-rails/VERSION
@@ -0,0 +1 @@
+0.4.1
diff --git a/contrib/react-rails/lib/react-rails.rb b/contrib/react-rails/lib/react-rails.rb
new file mode 100644
index 00000000000..35928b4ebc0
--- /dev/null
+++ b/contrib/react-rails/lib/react-rails.rb
@@ -0,0 +1,3 @@
+require 'react/jsx'
+require 'react/rails'
+
diff --git a/contrib/react-rails/lib/react/jsx.rb b/contrib/react-rails/lib/react/jsx.rb
new file mode 100644
index 00000000000..5560d8fc4e3
--- /dev/null
+++ b/contrib/react-rails/lib/react/jsx.rb
@@ -0,0 +1,17 @@
+require 'react/source'
+require 'react/jsx/template'
+
+module React
+  module JSX
+    def self.context
+      # TODO: create React::Source::contents_for
+      contents = File.read(React::Source.bundled_path_for('JSXTransformer.js'))
+      @context ||= ExecJS.compile(contents)
+    end
+
+    def self.transform(code)
+      result = context.call('JSXTransformer.transform', code)
+      return result['code']
+    end
+  end
+end
diff --git a/contrib/react-rails/lib/react/jsx/template.rb b/contrib/react-rails/lib/react/jsx/template.rb
new file mode 100644
index 00000000000..ac454ae59c5
--- /dev/null
+++ b/contrib/react-rails/lib/react/jsx/template.rb
@@ -0,0 +1,18 @@
+require 'sprockets'
+require 'sprockets/engines'
+
+module React
+  module JSX
+
+    class Template < Tilt::Template
+      self.default_mime_type = 'application/javascript'
+
+      def prepare
+      end
+
+      def evaluate(scopre, locals, &block)
+        @output ||= JSX::transform(data)
+      end
+    end
+  end
+end
diff --git a/contrib/react-rails/lib/react/rails.rb b/contrib/react-rails/lib/react/rails.rb
new file mode 100644
index 00000000000..53973dea2c7
--- /dev/null
+++ b/contrib/react-rails/lib/react/rails.rb
@@ -0,0 +1,2 @@
+require 'react/rails/railstie'
+require 'react/rails/engine'
diff --git a/contrib/react-rails/lib/react/rails/engine.rb b/contrib/react-rails/lib/react/rails/engine.rb
new file mode 100644
index 00000000000..8ac21fa0704
--- /dev/null
+++ b/contrib/react-rails/lib/react/rails/engine.rb
@@ -0,0 +1,15 @@
+require 'sprockets'
+require 'sprockets/engines'
+# require 'react/jsx/template'
+
+module React
+  module Rails
+    class Engine < ::Rails::Engine
+      config.before_initialize do |app|
+        # force autoloading? what?
+        Sprockets::Engines
+        Sprockets.register_engine '.jsx', React::JSX::Template
+      end
+    end
+  end
+end
diff --git a/contrib/react-rails/lib/react/rails/railstie.rb b/contrib/react-rails/lib/react/rails/railstie.rb
new file mode 100644
index 00000000000..fd28c8068f9
--- /dev/null
+++ b/contrib/react-rails/lib/react/rails/railstie.rb
@@ -0,0 +1,33 @@
+require 'rails'
+
+module React
+  module Rails
+    class Railtie < ::Rails::Railtie
+      config.react = ActiveSupport::OrderedOptions.new
+
+      initializer "react_rails.setup_vendor" do |app|
+        variant = app.config.react.variant
+
+        # Mimic behavior of ember-rails...
+        # We want to include different files in dev/prod. The unminified builds
+        # contain console logging for invariants and logging to help catch
+        # common mistakes. These are all stripped out in the minified build.
+        if variant = app.config.react.variant || ::Rails.env.test?
+          variant ||= :development
+          # Copy over the variant into a path that sprockets will pick up.
+          # We'll always copy to 'react.js' so that no includes need to change.
+          # We'll also always copy of JSXTransformer.js
+          tmp_path = app.root.join('tmp/react-rails')
+          filename = 'react' + (variant == :production ? '.min.js' : '.js')
+          FileUtils.mkdir_p(tmp_path)
+          FileUtils.cp(::React::Source.bundled_path_for(filename),
+                       tmp_path.join('react.js'))
+          FileUtils.cp(::React::Source.bundled_path_for('JSXTransformer.js'),
+                       tmp_path.join('JSXTransformer.js'))
+          # Make sure it can be found
+          app.assets.append_path(tmp_path)
+        end
+      end
+    end
+  end
+end
diff --git a/contrib/react-rails/lib/react/rails/version.rb b/contrib/react-rails/lib/react/rails/version.rb
new file mode 100644
index 00000000000..cb3d9dad473
--- /dev/null
+++ b/contrib/react-rails/lib/react/rails/version.rb
@@ -0,0 +1,8 @@
+module React
+  module Rails
+    # Version numbers will track react-source, but we'll add another level so
+    # that we can increment, but have some amount of stability.
+    VERSION = '0.4.1.0'
+  end
+end
+
diff --git a/contrib/react-rails/react-rails.gemspec b/contrib/react-rails/react-rails.gemspec
new file mode 100644
index 00000000000..693d36bb72d
--- /dev/null
+++ b/contrib/react-rails/react-rails.gemspec
@@ -0,0 +1,27 @@
+# encoding: utf-8
+
+$:.push File.expand_path('../lib', __FILE__)
+require 'react/rails/version'
+
+Gem::Specification.new do |s|
+  s.name = 'react-rails'
+  s.version = React::Rails::VERSION
+  s.summary = 'React/JSX adapter for the Ruby on Rails asset pipeline.'
+  s.description = 'Compile your JSX on demand or precompile for production.'
+  s.homepage = 'https://github.com/facebook/react-rails'
+  s.license = 'APL 2.0'
+
+  s.author = ['Paul O’Shannessy']
+  s.email = ['paul@oshannessy.com']
+
+  s.add_dependency 'execjs'
+  s.add_dependency 'railties', '>= 3.1'
+  s.add_dependency 'react-source', '0.4.1'
+
+  s.files = Dir[
+    'lib/**/*',
+    'README.md'
+  ]
+
+  s.require_paths = ['lib']
+end