[Discover] Always on Time with MarkThisDate.com http://www.markthisdate.com/
(google calendar tools directory) 
[Discover] iCalShare - Share Your iCalendars! http://icalshare.com/ (ical apps apple calendar)
[Discover] Working with IMAP and iCalendar http://www.doughellmann.com/articles/mailbox2ics/index.html (ical python coding howto)
[Discover] Mooie sportzomer! http://www.mooiesportzomer.nl/ (ical)
[Discover] DAViCal - DAViCal Home http://rscds.sourceforge.net/ (server ical caldav php)
[Discover] iCalShare - Share Your iCalendars! http://icalshare.com/index.php?topic=soccer (google ical calendar share)
[Discover] iCalShare - Share Your iCalendars! http://icalshare.com/ (ical apps apple calendar)
[Discover] Working with IMAP and iCalendar http://www.doughellmann.com/articles/mailbox2ics/index.html (ical python coding howto)
[Discover] Mooie sportzomer! http://www.mooiesportzomer.nl/ (ical)
[Discover] DAViCal - DAViCal Home http://rscds.sourceforge.net/ (server ical caldav php)
[Discover] iCalShare - Share Your iCalendars! http://icalshare.com/index.php?topic=soccer (google ical calendar share)