GridCalendar (abbreviated as grical), is an open web where people store quickly a few information about interesting events, so that others can also easily know about them. Grical makes easy and fast for its users to get notified and store interesting events in its own external calendars.
Schulferien und weitere iCal (.ics) Kalender
bohrt die datums-/uhrzeitanzeige auf (inkl. ical)
detects microformats on webpages and exports to ical/vcard
Webcalendar mit ical und multiuser support
Giggity is an Android app that loads xcal/Pentabarf XML files (that contain schedules of conferences/festivals/other events) and lets you browse them in various convenient formats.