Photo Desktop for Mac

From Colourful Apps:

Photo Desktop allows you to put photos on your desktop, instead of having to choose one photo to use as your wallpaper, you can now add as many little pictures to your desktop as you want.

Photo Desktop allows you to create the desktop you desire in a mini version of the desktop by dragging pictures onto it, resizing and rotating them on the spot. It also allows you to add photos by browsing your local iPhoto library.

Additional Features

• Works behind the desktop, desktop remains fully functional, though decorated with lots of photos
• Drag-'n-drop capabilities
• multi-monitor support
• Unobtrusive, only a small menu-item remains (and of course the photo's in background)

Minimal system requirements

• Mac OS X 10.3 (Panther) (Tested on 10.3.9), though optimized for 10.4 (Tiger)
• Mac OS X 10.4 (Tiger) (Tested on 10.4.2)
• For iPhoto browsing: iPhoto 4 / iPhoto 5

Localizations

• English
• Nederlands (Dutch)
• Français (French)
• Italiano (Italian)
• Deutsch (German)