Ranker - Ranker goes far beyond Top 10 lists with deep rankings about everything, voted on by everyone.
Similar Site Search - SimilarSiteSearch helps you find similar, related, or alternative websites.
Rewala - Decision-making application
SimilarSites - Easily find more sites like those you like.
TierMaker - Create a tier list for anything
TopSitesLike - TopSitesLike.