hack tool of the week - Responder-1.0

Tool functionalities:

Once this tool is launched, it will join the IGMP group and listen on UDP 5355 port multicast.
This tool will also listen on TCP port 139, 445, 1433, 80 and UDP port 137, if you have any service running on these ports, you will need to stop them prior launching this tool.
The tool will write captured hashes to a file in the current folder for each poisoned host with the following syntax: [SMB/HTTP/SQL]-[NTLMv1/v2]-Client-IP.txt in a John Jumbo format.The SMB server supports Windows ranging from NT4 to Windows Server 2012 RC, Samba, Mac OsX Lion.

http://blog.spiderlabs.com/2012/10/introducing-responder-10.html