Tools: Chrome, Sublime Text 2, CodeKit, Fireworks and Terminal
Libs: jQuery, Modernizr, Underscore, Grunt, Jasmine, Selenium (Python), LESS, Boilerplate
Websites: ClosureCompiler, Arantius Tabifier, Colorzilla Gradient Generator, JSBeautifier, Prefixr, lessphp

All of these help me a lot! Oh, we can't forget Grooveshark, iTunes, Quake 3 and Unreal haha