Durandal is a distributed GPU/CPU computing software that aims to crack passwords. Mostly written in C++ with the Boost library, it works on many systems, however it is only
built for Windows and GNU/Linux for the moment, on the x86 and x64 platforms.

Durandal is freely available under the GPLv3 license.

Features

Windows (XP, Vista, 7) and GNU/Linux support
32bits and 64bits support
Usual hash functions : MD5, SHA1, SHA256, SHA512, NTLMv1, MySQL (all versions)
SSE2 optimized, Nvidia CUDA support
Server, agent and administration console
Network communications with XML over HTTP (proxy support)

Download
http://durandal-project.org/download.html