Not sure if this will help, but I know (from the previously given link) that TTH is made up of Tiger Hash Algorithm and Merkle Tree (in what way, I'm not sure) and that:
"The original Tiger Hash code was taken from
Tiger.Net which is written in Visual Basic.NET."
As you can see, that site is no longer there. That would have been too easy...
EDIT 2: The project doesn't seem to hash correctly. I tested it against 2 files I have, and a database, and I got conflicting results. My files aren't corrupt, as all the other hashes are correct, and the database is pretty reliable. Not sure what to make of it. Can anyone help, or is my project doomed to have no TTH compatibility?