BDD style assertions for node.js -- test framework agnostic
A lightweight framework for regression testing of Cascading Style Sheets
Bluebird is a full featured promise library with unmatched performance.
Backbone debugger for Firefox
End user oriented web performance testing and beaconing
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Navigation scripting & testing utility for PhantomJS and SlimerJS
CSS coding style formatter
Quickly check how well 3rd party script behaves.
Creates Photoshop-like guides and rulers interface on a web page
Layout and functional testing framework for websites