Question2Answer - A Q&A site helps an online community to share knowledge.
Booking Ninja - Booking Ninja allows you to create a free, simple, online reservation tool for your restaurant or cafe.
Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
OpenTable - Make online restaurant reservations, read restaurant reviews from diners, and earn points towards...
SaidIt.net - Saidit.net - say your truth.
Hostme - Reservation, table, waitlist and loyalty management for restaurants