Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.
Phind - Shazam for landmarks and locations
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Foodetective - Simple food discovery from restaurants to bakeries
Nightler - Find the people. Live the night.
Menu In Pictures - A crowdsourced map for restaurant menus