FriendFilter - Auto unfriend tool for Facebook
Hvper - The Internet on one page. Successor of Popurls, the mother of news aggregators.
Detox for Facebook - Replace your Facebook feed with PH, HN, DN and more.
Notify by Facebook - Notifications that matter from sources you love
Keep My Friends - A lightweight, personal CRM to improve your relationships
FamousFix - Formally known as WhosDatedWho