Auditor Security Collection and Whax merge to create BackTrack
Live CD and live USB capability
BackTrack 2
Kernel 2.6.20
Metasploit2 and Metsploit3 support
Redesigned menu structure
BackTrack 3
Kernel 2.6.21.5
Saint and Maltego added
BackTrack 4
Kernel 2.6.34
Massively improved hardware support
Official FluxBox support
BackTrack 5
Based on Ubuntu Lucid LTS
Kernel 2.6.38
BackTrack Linux becomes Kali Linux
Support for BackTrack Linux ends
Complete platform rebuild
Based on Debian
Streamlined package updates synced with Debian