Security Distros

There is a comprehensive list of security distros, both active and retired at:

http://www.securitydistro.com/security-distros

They also offer tutorials (http://www.securitydistro.com/security-distros), a rather barebones tools page (http://www.securitydistro.com/security-tools) and an events page (http://www.securitydistro.com/security-events). 

Fyodor’s SecTools Top 125 is a much better page, in my opinion, for tools (http://sectools.org/) .