Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Tuio - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.

attending.io - Tiny event pages to ask people one question – are you attending? Twitter login.

GoPad for Schools - School Management

Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform

Yusp - Yusp is a next generation, real-time personalization engine having all product modules as defined by Gartner for various business models.