Open Source Scheduling Software?

Anyone know of a good open source scheduling software? with a calendar and such? I’m looking to organize my time a little better. thanks in advance


Sunbird (based off of mozilla):


Evolution Calander
Evolution Task List

Didn’t you see this post? I just downloaded Rainlendar and I quite like it. It’s not open source (as far as I know), but it is free and it works great.

I’d love a calender that would interface with my Motorola v180 phone’s calender. More specifically, I’d like it if the calender extension for ThunderBird interfaced with my phone…I guess I’ll keep dreaming…