SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Rapid environment editor - Rapid Environment Editor - freeware Windows environment variables editor
SANeForce - SAN Pharma Sales Force Automation
eveditor - Your trusty environment variables editor
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
Path Editor (Open Source) - Edit PATH environment on Windows conveniently.