Found here: http://reqrypt.org/tallow.html
Doing a bit of research and have been reading about it, seems like a good product, but have never used it myself let alone been at a point where I've relied on it for anything important.
Just trying to see if anyone else here has any experience with it :)
EDIT: Found a review/comment page on /r/TOR :
http://www.reddit.com/r/TOR/comments/2n1wb1/tallow_transparent_tor_for_windows/
I tested it last week because I wanted to test a specific app over Tor, seemed to work fine. Dunno about using it for darknet market purposes though.