Ace

• https://github.com/ajaxorg/ace/blob/master/lib/ace/selection.js
• https://github.com/ajaxorg/ace/blob/master/lib/ace/commands/default_commands.js
• https://github.com/ajaxorg/ace/blob/master/lib/ace/document.js

commonjs

• http://wiki.commonjs.org/wiki/Filesystem/A
• https://github.com/280north/narwhal

JSCocoa

• http://parmanoir.com/Taming_JavascriptCore_within_and_without_WebView

Cloud9

• Extensions: http://cloud9ide.posterous.com/writing-an-extension-for-cloud9-javascript-id
• https://github.com/ajaxorg/cloud9/blob/master/client/ext/extension_template/extension_template.js