Now it’s time to change the backtrack previous backtrack 5r2 was released at 1st march 2012 with many new security tools and features but now a new version has been came with a lot of powerful security essential tools.
Building, testing and releasing a new Backtrack revision is never an easy task.Keeping up-to-date with all the latest tools, while balancing their requirements of dependencies, is akin to a magic show juggling act. Thankfully, active members of our redmine community such as backtrack lover and Judas Iscariot make our task that much easier by actively reporting bugs and suggesting new tools on a regular basis. Hats off to the both of you.
Backtrack 5r3 has released just today at 13th august 2012 you can download it from official web site it is free to download and best offense security tool for all.
Go here http://www.backtrack-linux.org/downloads/ to download this security OS. you can also download vmware file or you can install it on virtual machine.