Is there a website that provides ad-free free web hosting? I tried out couple of them, but always had problems with dns or other.
Dreamhost Apps [1] is really great if what you want to host is simply a popular webapp such as phpBB, WordPress, Drupal, or MediaWiki.
It's completely free with no ads. The idea is that you'll love their service and eventually when you want to be able to host more (or install your own mods or whatever) you'll seamlessly upgrade to one of their paid plans. But if you're happy with a simple install you can just have it free forever!
I have a few friends that use this service and have had a very happy experience with it.
[1] http://www.dreamhostapps.com/www.funpic.de or www.atspace.com
You may be interested in MemeBot [1]. You get free hosting, with the ability to run cgi/php scripts, if you want. You can't use MySQL or any other real database, but you can use SQLite. Also, they have a handful of ready-to-install apps (like wiki, blog, etc) if you want them.
[1] http://www.memebot.com/You can try this one Freehostia.com [1]. I'm use that for a few years.
[1] http://www.freehostia.com/And also: http://www.000webhost.com/features
http://www.awardspace.com [1] has free hosting, they also let you use PHP and MySQL. The only ads they show are for 404 pages.
[1] http://awardspace.com/