LiveReload - LiveReload 2 proudly presents… The Web Developer Wonderland. (a happy land where browsers don't need a Refresh button). CSS edits and image changes apply live. CoffeeScript, SASS, LESS and others just work.
ViewHTTPHeaders.com - View HTTP header response for any web page.
Browsersync - Browsersync makes your tweaking and testing faster by synchronising file changes and interactions...
Sky Live HTTP Headers - Sky Live HTTP Headers is an open-source browser extension that visually displays HTTP requests and response headers from every website you visit.
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
Live HTTP Headers - The goal of this project is to adds information about the HTTP headers in three ways: