Facebook Local - Discover places to go and events happening near you
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Foodie Advice - Get suggestions on what to eat during your travels
Bookmark It - Create awesome notes on YouTube videos
Foursquare - Foursquare is all about helping you find new ways to explore your city.
PageMarker - Save, organize, annotate and revisit your bookmarks