Plans, the best web calendar.
Users say:
I've been playing with your Plans software and think it's pretty amazing! Lots of good features and customizations! Thanks again for an excellent calendar system!

Who uses Plans?

Plans is currently used by:

See what Google has to say.

Plans has an entry on Freshmeat, where some folks have posted comments.

TotalChoice Hosting has detailed instructions for running Plans on their servers.
(Disclaimer: has no business relationship with TotalChoice Hosting.)

(Disclaimer-er: In fact, has no business relationship at all. The ".com" is sort of misleading.)