"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.
The character sheet now lists effects. The code for it was in the last beta release, but disabled because it wasn't working. Turns out a line was in a wrong place, so it was a pretty easy fix.