Firebug Lite : A JavaScript file you can insert into your pages to simulate the Firebug console in browsers that are not named Firefox.
Dimensions Browser Extension : Measure between the following elements: images, input-fields, buttons, videos, gifs, text, icons. You can measure everything you see in the browser.
Web Audio Studio : Visualize and debug Web Audio graphs
Write Web Audio API code and instantly see the graph it creates.
Inspect signal flow, tweak parameters, and hear ...
WebTorrent : WebTorrent is a streaming torrent client for the web browser and the desktop.
WebTorrent is written completely in JavaScript – the language of the web...
Wick : Wick is a free browser-based toolkit for creating small interactive things for the Internet. With Wick, you can create games, animations, and everythi...