Pause Magazine: Lego Reference Guide - Features set pictures, original creations, lists, articles, links, and general Lego information. Last updated in 1998. - http://www.lugnet.com/pause/
Peeron Lego Inventories - Searchable database of pieces and sets including photographs of each. - http://www.peeron.com/
Fibblesnork Lego Guide - Find Lego series, sets, and systems by type, year, and name. Ratings provided. - http://www.lugnet.com/fibblesnork/lego/guide/
Lego Photography - Photographing Lego models is not easy. For starters, the pieces are shiny and colors such as black are very difficult to develop. Includes tips and tutorials. - http://www.baylug.org/ninja/original/Photography.html
Lego Set Review Archive - Reviews of Lego sets as they appeared on rec.toys.lego. Includes history of review format, and related links. - http://alumni.cse.ucsc.edu/~dulcaoin/reviews/
BrickShelf - Features a members photograph gallery, poll, search, and archives from Brickfest. Lego instruction and catalog scans available. - http://www.brickshelf.com/
The Construction Toy - Features detailed history of American Plastic bricks, building blocks, lincoln logs, Lego Technic and Model team sets. - http://www.chem.sunysb.edu/msl/lego/
Frank's Lego Sites - Includes the Lego lexicon, an encyclopedia of Lego related words. - http://members.chello.nl/~f.buiting/lego/
Brickset - Database of Lego sets from the 1970's onwards, including many promotional and special sets not listed elsewhere. - http://www.brickset.com/
Lego Maniacs' Guide - Hundreds of Lego set reviews, a directory of all Lego sites, creations, and games from Adequate.com. - http://www.adequate.com/lego/