Doomlike Dungeons Mod 1.8, 1.7.10, 1.7.2 is for those who want adventure, danger, and tactical challenges. Yeah, there are plenty of dungeons mods out there, but why not one one more?  It also allows blocks, mobs, and items from other mobs to be used in the dungeons, while keeping to vanilla ones by default (should be compatible with practically everything).