Django - The Web framework for perfectionists with deadlines
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Pylons Framework - Pylons Framework is an open source Web application framework written in Python.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Node.js - Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications
Attendify - Develop relationships at the events that you attend by creating smaller events with just a few people.