Event Tickets allows your visitors to RSVP and buy tickets to events
Manage events on a Google Calendar
Generate calendars in the iCalendar format
Web based Contact Manager v1.5.0
Standalone chat system developed in php, mysql and javascript
Event tickets for SilverStripe and Event Calendar
Decentralised PHP based event calendar
calendar based vertical table cell data management application
Scada for Home Automation
WordPress event calendar plugin
Calanda 0.8 beta. Update to Calanda 0.7
A calendar made in php/mysqli