Rapid Environment Editor (RapidEE) is an environment variables editor. It includes easy to use GUI and replaces small and inconvenient Windows edit box.

Features:

Editable tree
Show environment variables and values as an editable tree.

Portable mode
RapidEE doesn't require installation and could be run as a "portable application". View details.

Error checking
Automatically checking for invalid pathnames and filenames

Multilanguage interface
RapidEE is translated into number of languages (English, Russian, Japanese, French, Polish, German, Italian, Latvian, Slovak, Greek, Spanish, Chinese, Dutch, Swedish, Korean), and the language can be changed on the fly.

Variable inspector
Inspector shows miscellaneous information about variables: name, type, value, short file name in the 8.3 naming convention for each long file name and vice versa.

No typing
You don't need to type long pathnames. Just choose path using File Explorer tree

Easy values manipulation
RapidEE supports drag'n'drop for reordering of variable values

Backup
Environment variables can be backed up to the registry file (.reg)

Skins
Skins allow you to change the look and feel of RapidEE

Multiuser support
If you have an administrative privileges then you can edit environment variables for any user on your computer.