Yelp Reservations - Reservations taken online, front-of-house management, and integration with Yelp.
Nightler - Find the people. Live the night.
simpleERB - An Electronic Reservation Book for restaurants.
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
NoWait - Restaurant Reservations
Discotech - Opentable for nightlife. Tickets, guest lists, and VIP.