iTerm2 is a terminal emulator for Mac OS X that does amazing things.

Spectacle allows you to organize your windows without using a mouse.

A window management application (replacement for Divvy/SizeUp/ShiftIt)

Managing windows size and position in OSX

Xcode plugin for Vim keybindings

MacGap 2

ARCHIVED: Version 1 of the AWS SDK for iOS

CoRD is a Mac OS X remote desktop client for Microsoft Windows computers using the RDP protocol. It's easy to use, fast, and free for anyone to use or modify.

Learn Xcode as a designer.

server on mac to receive airplay streams from ios devices - original code repo from http://code.google.com/p/airmac