One of those, is BackTrack, a hackers delight, one that is loaded with all the best Free Software and Open Source penetration testing applications available. The latest edition is BackTrack 5, code-named Revolution. We are actually at BackTrack 5 R2. Keep in mind that BackTrack is not a distribution for newbies. This is serious stuff.
Read the complete article at http://www.linuxbsdos.com/2012/03/08/backtrack-5-revolution-2-screen-shots/