Daddy & Daughter Dungeons & Dragons - Passing it on to the next generation...
The Elemental Planes Adventure that I did with my grade-school daughters. Includes writeups on most of the planes and a synopsis of what actually happened. (Still a work in progress.)
Evandor's Stuff - Writeups, history, notes, spells, etc. for the Wizard character I'm currently playing: A 12 and a half year old Wizard who dropped out of Fighter school to persue his love of books.
Mark's Alternate Random Treasure Generator - A variant on the DMG approach, more formula-based and a tich simpler.
Reflections on Playing a Bard - Experiences playing a Bard in the 3.5 edition of D&D.
Keeping the PCs humble - Includes sections on draining levels, taking away the toys, and devilish cursed item combinations.
Additional XP rewards - Some alternative things you could give XP awards for and in so doing, encourage behaviors that you'd like to see more often.
Articulating Your Alignment - Some synonyms for traditional D&D alignments that can help you to detail your character's persona a little better. Also includes examples of famous characters or people that seem to fit a perticular alignment.
Monster Maker - (Unfinished) A JavaScript web interface for increasing Hit Dice of monsters or adding class levels.
Webcomics inspired by D & D. A little light reading between supplement releases. :-)