Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
GitSpo - Measure & engage your open-source community
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
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.
Ruby Toolbox - Explore and compare open source Ruby libraries