We are not being paid by any of these places. We list them because we've found them to be honest.
Adorama is a supplier of just about everything photographic.
B & H Photo is a supplier of just about everything photographic.
Photo.net a good forum for discussion of technical issues in photography. Photo.net also has a large repository of user supplied photos some of which are very fine. It's a bit hapharzardly arranged and run, but well worth visiting.
Photosig is a photo sharing and critiquing site. The people who run it are unpleasant and there is a tremendous amount of mediocre photography there, but there is also, if you can find it, some fine photography.
Usefilm is another photo sharing and critiquing site. It has the best performance and the best photo-critiquing system I've found. Highly recommended.
Camerans is a brand new photography discussion and critiquing site. Not much there yet, but the site design is clean and attractive. We haven't noted a scoring system for photographs, which we think is a good thing.
Sightphoto is a refereed photography site. There is some very fine work there.
Photographysites.com keeps a large list of links to photography web sites. Well worth perusing.
Karl Price's photography. He's got some very good stuff.
Paul Politis' photography. He's one of our exhibitors and a damn fine photographer.