Always handy to have more options, El. Feel free to chuck 'em in here, I'll be interested if nobody else is.
The (New!) Red Handbook of Doom: a DM's Handbook for running The Red Hand of Doom A 3.5 DM's Guide to Using and Improving Monsters The Critical Hit Handbook The Runeblaster: a 3.5 Runecaster Handbook Grand GITP List of 3.5 Handbooks, Guides, and Compendiums