KeyCastr - KeyCastr lets you easily display your keystrokes while recording screencasts.
SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Screenkey - Screenkey is a screencast tool to display your keys inspired by ...
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
Carnac - A utility to give some insight into how you use your keyboard/
VC Starter Kit - Everything you need to look like a Venture Capitalist