Demosphere is a free and Open Source software for web calendars. It offers both a public interface (frontend) and an extensive management interface (backend) that moderators use to find and enter events. Demosphere can be considered as a productivity tool for finding and managing large numbers of events coming from many different sources.
Frontend: features a main calendar view, an interactive map of events, configurable widgets to display custom calendars on other websites, configurable RSS feeds, configurable event email subscriptions, custom selection of events, a user-friendly public event form, ...
Backend: Finding, selecting and entering events is a large amount of work. For example, the Paris site requires 3 hours of work every day. To make this work easier, we have developed many tools:
Demosphere-1 was based on Drupal. Demosphere-2, released in May 2013, no longer uses Drupal.
Thanks to Browserstack for giving free access to Open Source projects like ours.
This allows us to test our websites on lots of platforms, without having to buy them.