- http://bplaced.net offers 1 or 2 GB of webspace with lots of databases (mysql and postresql). The number of databases is depending on whether one choses the 1 or 2 GB plan. Fsockopen isn't activated, so you basically can't do automatic updating or check for updates.
- http://square7.ch is made by the bplaced guys. Fsockopen is activated but there are some decent ads.
- http://byet.host offers free hosting with fsockopen, MySQL databases and without ads.
Do you know other free hosts?
/edit: I removed my opinions about the hosts.