The site has been around since January 2008 and has grown a huge userbase.
Beside the challenges they write articles about IT Security and offer a forum.
Also noteable is that the site sourcecode is available on github, which i really like myself
Currently it offers 42 challenges from the classic challenge site categories like Javascript, SQLi and crypto, and there are also sections for beginners and intermediates.
We all wish you...
Happy Challenging!