LEGO - official company website (English)
LUGNET - International LEGO Users Group Network, global community of LEGO enthusiasts. LUGNET unites LEGO fans worldwide through forums, web pages, and services.
Brickshelf - online picture gallery for LEGO
LEGO Set Database - Displays over 4,000 LEGO products.
Lego instructions - set building instructions (scanned)
Lego catalogs - catalog library, 1958 to 2001
Creative uses of Lego's
PicToBrick - software to generate mosaics from digital pictures using bricks such as Lego's.
Brickforge - BrickStore is OpenSource software, a BrickLink offline tool.
Lego Router - using about $60 worth of black bricks to build a Lego Router, starting with a LinkSys WRT54GL.
Lego machines - not quite Mindstorms
Photos Republic Fighter Tank (December 2008)