I want to compile a list of the most common tools, frameworks & libs web developers are using today. Things seem to change daily with new, cool, and helpful projects announced all the time. It'd be great to nail some of these down as a reference.

Examples:

jQuery
Backbone
Underscore
Grunt
Mocha
Less
SASS
Compass

I'm sure there are others. Rebecca Murphey <a href="http://rmurphey.com/blog/2012/04/12/a-baseline-for-front-end-developers/">took a stab at this</a> a couple of months ago.

