SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
ICU - Icon Configuration Utility - Restore your desktop when the icons get “rearranged”.
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
VC Starter Kit - Everything you need to look like a Venture Capitalist
Fences - Keep your desktop organized with Fences. This is a simple software program that allows you to sort the tabs on your desktop and create files that are easily recognizable to you.
iCollections - Organize your Mac desktop items.