Not at the moment. ownCloud does my file backup and sync between devices, calendar, cloud music player and to-do list manager.

I'm considering setting up my own e-mail system, but haven't gotten around to it yet.

EDIT: Actually, I forgot I installed Piwik for web analytics. Not that it's in any way needed for what I do, but I wanted to see what it's like. I was impressed, but haven't pushed it yet.