All the Dungeon Crawlers

Dungeon Crawlers are those pseudo-3D maze games where you stomp around one square at a time, turning at 90 degree angles. The purpose of Dungeoncrawlers.org, then, should be obvious: to build "an online database for classic and modern first-person grid-based dungeon crawler games."

The design's great, too: nice and straightforward, but with a bit of period atmosphere! They've got everything from Alkalabeth to Grimrock.