Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Tablehero - A restaurant management system that keeps tables full
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
SevenRooms - A reservation, seating and guest management solution for hospitality operators to acquire, engage...
Org mode - Org: an Emacs Mode for Notes, Planning, and Authoring
Yelp Reservations - Reservations taken online, front-of-house management, and integration with Yelp.