Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
GitNews Web - Trending repositories from GitHub, HackerNews & Reddit
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