The "B" List - Fan site reviews Sims links, and identifies whether their content includes unique objects, skins, tutorials and programs. - http://theblist.com/
EmberLeFeys Sim Surfer - Searchable multi-page list of sites with descriptions of each, compiled and reviewed by Sammy Surfer. - http://www.thesimsurfer.com/
The Ultimate Sims List - A portal to The Sims sites. Find new Sim sites, rediscover old sites, announce a site, review and rate sites, and download skins. - http://www.ultimatesims.com/