Rogue is the original roguelike game. I made the java applet version of it in 1997 here. I wrote hexagonal rogue a few years later. [more inside]
A fast-paced dungeon delving webgame inspired by Gauntlet and roguelikes. [more inside]
Glenn Wichman is one of the three people who made the computer game Rogue, bits of which are visible in roguelikes (of course), many computer RPGs, and MMORPGs. We interviewed him today for the Roguelike Radio podcast.