VarHammer is a Windows, Mac OS X JavaScript Project Obfuscator and Minifier – Analyze, Obfuscate,  and Minify Your JavaScript Code.

VarHammer www.varhammer.com is an easy-to-use, self-explanatory, and neat JavaScript obfuscator and minifier application for Windows and Mac OS X. Compress and obfuscate function and variable names, and obfuscate characters in strings.

There are free trials for Windows at: http://www.varhammer.com/varhammer.zip and for Mac OS X at: http://www.varhammer.com/varhammer_mac.zip

and a 3-steps online help:
Step 1. Add files – http://www.varhammer.com/add-files/
Step 2. Analyze project files – http://www.varhammer.com/analyze-project-files/
Step 3. Obfuscate and print files – http://www.varhammer.com/obfuscate-print-files/

Purchase at http://www.varhammer.com/purchase/  As a registered customer, you are entitled to priority technical support and free updates to all later versions.