TiltViewer is a free, customizable 3D Flash image viewing application you can add to your site to create a lovely, interactive wall of photos. In just a few minutes I put together a demonstration page to show off the effect.
The images are being pulled from my Flickr account, and if you click on the rotate icon in the bottom right hand corner, you can the Flickr description of the image along with some other data, which could make TiltViewer a nice little flash card exercise with the image on one side and answers on the reverse.
If you plan to use this with stand alone photos, it does require some mucking with an XML file, but the instructions are straightforward.
Create an interactive wall of images with TiltViewer by Clint Lalonde is licensed under a Creative Commons Attribution 4.0 International License.