Functions of WATOBO:

Supports session management.
Detects logout and automatically takes a re-login.
Supports filter functions
Inline-Encoder/Decoder
Includes vulnerability scanner
Quick-scan for targeted scanning a URL
Full-scan to scan a whole session
Manual request editor with special functions
Session information is updated
Login can be done automatically
Transcoder
URL, Base64, MD5, SHA-1
Interceptor
Fuzzer
Free, Stable and Open source!
Script code easy to understand
Easy to extend / adapt
In real-world scenarios tested and developed
Speed / usability
Active and Passive checks

Download
http://sourceforge.net/projects/watobo/files/

Video Tutorials:
http://sourceforge.net/apps/mediawiki/watobo/index.php?title=Videos

BackTrack 5
Source:Download and installation
http://pastebin.com/cnsM6dkS