Below is a comprehensive list of projects I've been involved with, both large and small:
1998 Galovinius Web Page
2000 - Action Check Online Magazine #6 - The Darkland Empire (A campaign world addition for the Alternity incarnation of Gamma World).
2001 - Dark Portal Games - Dead Fire, Gateway: City of Living Waters, White Robes, Black Hearts: Enigma of the Arcanexus.
2001 - Asgard Online Magazine - #3 Rogues of the Bloody Sash and Asgard Online Magazine #4 Order of the Demilich.
2001 - Wizards of the Coast - Star Wars Gamer #6 - Welcome to the Jungle.
2002 - Wizards of the Coast - Dragon Magazine - #294 Relics of the Faith, #295 Every Home a Castle.
2002 - Bastion Press - Oathbound: The Waters of Akaya
2003 - Bastion Press - Ascension Day (Oathbound: Plains of Penance), Oathbound: Wrack & Ruin, Oathbound: Arena.
2003 - Bastion Press Website - Biological Hulls (Aditional material for use with the critically acclaimed book Airships by Sam Witt.
2003 - Wizards of the Coast - Book of Exalted Deeds.
2003 - Wizards of the Coast Website: Astral Encounters, Astral Encounter II, The Kaorti Ubercyst, Adventure: Matters of Vengeance, Complete Warrior Web Enhancement.
2004 - Mongoose Publishing - Signs & Portents #11 States of Decay.
2004 - Bastion Press - Oathbound - Wildwood.
2004 - Wizards of the Coast - Serpent Kingdoms.
2004 - Wizards of the Coast Website: Adventure: Dry Spell, Serpent Kingdoms Web Enhancement, Cult of Tharizdun
2005 - Wizards of the Coast - D20 Apocalypse
2005 - Wizards of the Coast Website - Project Javelin Campaign Primer, Heroes of Battle Web Enhancement, Lords of Madness Web Enhancement, Stormwrack Web Enhancement: The Kopru Ruins, D20 Past Adventure: Sagebrush Horror
2006 - Wizards of the Coast - Mysteries of the Moonsea
2007 - Darrin took a much needed break from the industry this year.
2008 - Kobold Quarterly #6 - The Alchemist's Lair
2008 - Gunmetal Games - Reign of Discordia, Reign of Discordia: Virus
2008 - Paizo Publishing - Pathfinder Adventure Path #16: Abominations of the Drow
2009 - Paizo Publishing - Pathfinder Adventure Path #21: The Jackal's Price and Bestiary, Pathfinder #26: The Graveknight