Some Free Image Hosting Sites

[Oscar799]

Images can be uploaded to these sites free of charge

http://www.imageshack.com/
http://tinypic.com/
http://photobucket.com/
http://www.flickr.com/
http://imgur.com/

omploader is now here http://omploader.org/

[BostonPeng]

Don't forget http://www.dropbox.com. You can upload there without installing software on your computer. I was able to do uploading while I was without a computer to call my own.

[soccerz619]

ompldr is the best, because you don't need an account. Super fast.

[vrkalak]

A couple more of the'free' Image Hosting sites, I use:

http://imagebam.com
http://imagevenue.com

The main Imagebam Hosting Service has now released a new 'Quick' Image Hosting site similar to Ompldr.

http://imagebin.org

[CrashedHash]

Another free service is:

http://imgbox.com/

[Ikem]

That's the one I use:

http://www.hostmypic.de/

[izzo]

imgur is what I use when need to post an image on a forum - very fast.
For everything else - screw photobucket, screw imageshack and crap like that; picasa all the way!