
ChowDive Nationwide is a restaurant-recommendation engine that combines your favorite restaurants into a single set of suggestions optimized for you. Data used for ChowDive is accessible via API here.
Other tools from MooreMetrics:
AuthorDive.com
GameDive.org (for video games)
MovieDive.org
PodDive.org (for podcasts)
ShowDive.com
AllDive.org (for all above combined)
RecipeDive.com
PharmaDive.org (for pharmaceutical compounds)
CollegeDive.org
GunDive.com
LifeDive.org
FashionDive.org
FragranceDive.com
Moore Typology (personality test)
For folks in the Northeast U.S.:
PhillyMatch.org