registration software

I'm looking for conference registration software recommendations. We won't be taking payments (it's an internal event), but I do want to be able to track:

* RSVPs
* rooming requests
* special food requests
* special travel requirements

We may also want to be able to track attendance to different sessions.

Do you know of something that would be good or great for us to consider?

plant qotd

If you were a bush or tree, what would you be, and why?