Diagnostic.css : Diagnostic.css is a stylesheet which allows the user to test for common errors in a page's markup.
Also : https://github.com/karlgroves/diagnostic.css
Yellow Lab Tools : Online test to help speeding up heavy web pages
Scrollback : Beautiful text chat for your community.
Scrollback hosts rooms that can be easily embedded on any website.
Fluid Framework : Fluid Framework is a collection of client libraries for building distributed, real-time collaborative web applications. These libraries allow multiple...
A collection of simple recommendations for decent Web application frontends
