icalendar.rb is a Ruby library for parsing and generating iCalendar files.
JSiCal provides a JavaScript agenda application based on the iCalendar file format. It is very easy to integrate in your Web application.
ICalendar Validator checks the encoding and structure of your ICalendar resources against the ICalendar specifications.
Simian is an enterprise-class Mac OS X software deployment solution with Google App Engine-based hosting and a future proof client based on the Munki open source project.
A GUI for Wine.
A very small subset of grep/ack/rak, for lazy developers.