Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Playfire - Playfire is the global community for gamers.
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features
Gamefly - Leasing computer games used to be a foundation of computer game society.
Ticket Tribe - Sell tickets online with no fees per ticket
Gaikai - Gaikai is a company which provides technology for the streaming of high-end video games.