"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.
To know monster type, you need to make a DC 10 Knowledge check. To know their exact hp, you need to make a DC 10 Heal check. Checks are made when first spotting a monster, just like the Knowledge check to know templates.
All this is to increase the suspension of disbelief and to reduce the feeling of "numbers, numbers, more numbers".