RelaX

You could make it yourself in PHP?
It would be hard to do on a Windows machine (I think, don't have any experiance with it), but on a *nix box it shouldn't be that much code to get the filenames of a directory. I would have no idea how to get the lastModified attribute of a file though, but I'm sure there's documentation on it somewhere.
However, this doesn't help you at all if you don't know PHP a bit already.

You might want to check out Arles Image Web Creator though, I used it a lot before and it might suit your needs.

__________________
The most likely way for the world to be destroyed, most experts agree, is by accident. That's where we come in; we're computer professionals. We cause accidents.
- Nathaniel Borenstein