Every developer has a list of tools and tweaks that they build up over time to increase their productivity. Here is a list of the little things I find useful to install everytime I set up a new machine. For reference, I am running Mac OS X 10.8 Mountain Lion, so many of these tools may be specific to that platform.
QuickLook
Terminal Hacks
See my osx.sh for a list of useful Terminal hacks.
Keyboard Remapping
See these articles to set up your own awesome keyboard mappings.
See my .slate config file and my KeyRemap4MacBook xml file to see how I’m using these tools.
In addition, modify Application windows in System Preferences -> Keyboard -> Keyboard Shortcuts -> Mission Control to respond to hyper+tab.
Sublime Text 2
LESS via Package Control (GitHub)CoffeeScript via Package Control (GitHub)jQuery via Package Control (GitHub)Git via Package Control (GitHub)Tag via Package Control (GitHub)Other
"font_face": "Inconsolata-g"