9-11 "Truth"

911Myths
Compendium of conspiracy theories and web sites.

911 Transcripts
Blogged transcripts of interviews with fire-fighters, policemen and emergency personnel.

"Critical Analysis of the Collapse of the WTC Towers 1, 2 & 7 from an Explosives and Conventional Demolition Industry Viewpoint" (PDF, 60k)
by Brent Blanchard, Senior Editor of ImplosionWorld.com and Director of Field Operations of Protec Documentation, Inc.

Debunking 9/11 Conspiracy Theories
"Exploding the Myths"

Good Science and 9/11 Demolition Theories
Scientific refutations.

ImplosionWorld.com
Q&A on WTC Collapse

Screw Loose Change
Bloggers expose deception and fabrication in "Loose Change" film.

Thermite
Wikipedia entry.