"A fantasy d20-themed dungeon crawler", to quote DarkGod's comment. Inspired by Incursion by Julian Mensch. Made available under Open Game License. This is a non-profit fan project. No money is made. There are currently only two people working on the mod. However, we have released several beta versions so far.
As I said, randomizing trainer class was the biggest hurdle. Now that it's done, work is coming quickly. I wonder what class this trainer is...?
He offers Survival, Use Magic, Knowledge and one more skill that didn't fit on screen.