While not super featureful and mature, ZenPhoto is a very well thought out photo gallery webapp, from both the user, administrator, and developer's point of view. This is my sample/practice Hello World plugin. I like ZP but it is missing some features I want and I am going to learn how to add them.

I may never get around to completing this fucking thing. I still want ZenPhoto to:

• auto rotate images according to JPEG metadata
• Have easy one-click editing buttons for each image -- rotate, flip, sepia, B&W, sharpen, etc.