If you ever need to recover lost password to your RAR file (or, let’s be honest, unrar a file you got from the Internet), look no further than cRARk – beautifully done RAR password recoverer. It’s the only utility capable of using NVIDIA CUDA, which utilizes GPU for password permutations, and even without that it’s extremally fast. And it’s free!

You can download it at http://www.crark.net