I've done a few things (somewhere in the 20+ writing and design credits). The ones I'm most proud of are (in order of swelling pride):
Dungeon Crawl Classics #1: Idylls of the Rat King (Goodman Games)
Dave Arneson's Blackmoor (Goodman Games)
Dave Arneson's Blackmoor: The Redwood Scar (Goodman Games)
Dave Arneson's Blackmoor: The Wizard's Cabal (Goodman Games)
Interludes: Brief Expeditions to Bluffside (Mystic Eye Games)
Geonosis and the Out Rim Worlds (Wizards of the Coast)
Advanced Players Handbook (Swords & Sorcery Studios)
I'm actually working on a redux of my cartography credit in the Blackmoor campaign guide. I'll post the whole story of the map and the reason behind the redux in a seperate thread when my map is close to done.