Django - The Web framework for perfectionists with deadlines
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Pylons Framework - Pylons Framework is an open source Web application framework written in Python.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Node.js - Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.