Take your pick… but choose wisely !
BackTrack [5]Source: http://www.securitydistro.com/security-distros/ [26]
Links:
[1] http://linux.philosweb.com/drupal/category/it/software/foss
[2] http://linux.philosweb.com/drupal/category/it/it-general
[3] http://linux.philosweb.com/drupal/category/it/open-source-foss
[4] http://linux.philosweb.com/drupal/category/it/security
[5] http://www.securitydistro.com/security-distros/1/BackTrack.php
[6] http://www.securitydistro.com/security-distros/45/ChaoxNG.php
[7] http://www.securitydistro.com/security-distros/2/Damn-Vulnerable-Linux-DVL.php
[8] http://www.securitydistro.com/security-distros/6/DEFT.php
[9] http://www.securitydistro.com/security-distros/40/FCCU.php
[10] http://www.securitydistro.com/security-distros/22/Frenzy.php
[11] http://www.securitydistro.com/security-distros/33/grml.php
[12] http://www.securitydistro.com/security-distros/7/Hakin9.php
[13] http://www.securitydistro.com/security-distros/8/Helix.php
[14] http://www.securitydistro.com/security-distros/36/HeX.php
[15] http://www.securitydistro.com/security-distros/9/KCPentrix.php
[16] http://www.securitydistro.com/security-distros/4/KnoppixNSM.php
[17] http://www.securitydistro.com/security-distros/11/Network-Security-Toolkit-NST.php
[18] http://www.securitydistro.com/security-distros/10/nUbuntu.php
[19] http://www.securitydistro.com/security-distros/34/Ophcrack.php
[20] http://www.securitydistro.com/security-distros/41/OSWA-Assistant.php
[21] http://www.securitydistro.com/security-distros/12/OWASP-Labrat.php
[22] http://www.securitydistro.com/security-distros/13/Protech.php
[23] http://www.securitydistro.com/security-distros/42/Russix.php
[24] http://www.securitydistro.com/security-distros/44/Samurai.php
[25] http://www.securitydistro.com/security-distros/38/Stagos-FSE.php
[26] http://www.securitydistro.com/security-distros/