The Horde Project really has a lot of applications under its reign. In my opinion it’s by far the best web email client out there, but Kronolith, Jonah, and Gollem look really good. There should be a directory of high quality free PHP scripts. I’ve started using the Task application to track things I’m doing and should be doing, though the interface is a litle clunky. Something small and simple might be more in order.
Speaking of websites that should exist, Josh picked up This is the Matrix.net yesterday. Hopefully something cool will come out of it. 🙂