Free Image Home
Here's a free image hosting service that gives you 20 megs of space and offers 250 megs of monthly bandwidth. Free Image Home lets you browse your uploaded images and the service supports JPG, GIF and PNG image formats.

Imgzhost
Here's a free image hosting service that is easy to use and supports a large number of file formats. ImgzHost.com is suitable for posting images to message boards, online auctions, online classifieds, etc. Each image you host here can be up to 5 megs in size.

Image Up
This service will host your images for free. You are permitted to link or embed images hosted at this site on personal sites, message boards, classifieds, and individual online auctions. No adult content is allowed.

Image Upload
A free image hosting service, ImageUploads is easy to use and allows hotlinking.  Supported image formats include GIF, JPG.

Picgoo
This is a free image hosting service that sets no limits on your bandwidth or storage usage and allows hotlinking. You can use Picgoo.com for Web sites, message boards, eBay auctions, and more. The site supports GIF, JPG and PNG images.