If your development environment is Windows, Rapid Environment Editor is going to be your new favorite power user application.
This nifty little application is helpful in readily accessing the obscure to change OS environment variables.
It provides an easy to use GUI where-in you can boss around your Windows Environment with ease and with much more power than the small and “hard to understand” default environment editor.
The home URL is here.
The latest version RapidEE 8.x supports all versions of Windows, XP, 2003, Vista, 2008, Windows 7 & 8 and both 32 and 64-bit versions. It is also available as a portable download!