SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
Splittable - Shared living made simple
VC Starter Kit - Everything you need to look like a Venture Capitalist
EquiTable - Split the bill fairly