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.
Ruby Weekly - A free, once–weekly e-mail round-up of Ruby news and articles.
Browsersync - Browsersync makes your tweaking and testing faster by synchronising file changes and interactions...
Tapes for Mac - Share screencasts fast.
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
Fogbender - All existing support tools are built for talking to a single user.