4Images
It allows you to enable / disable user uploads. People can rate, email, add comments or send an e-card of the pictures. 4images can resize your pictures using GD or Imagemagick or some other scripts (dont remember them all).
It has a very easy to edit template system, and the script is FREE of charge!
You can find it at 4homepages.de
Please make sure to download the english language files as well
Regards,
Niklas