I wanted to recommend two php applications that I recently setup for our own use and was very impressed by them. One of the biggest things that impressed me about both was how ridiculuosly easy each one made the install process. Something we need to improve for the Syntax CMS open source projectwe use at work.
Gallery has a slick web-based install and configuration end, it tests your server setup to make sure which features will work. I can’t begin to list all the features here but the one that I like the most is the java applet for uploading images into albums.
I could go on and on in this post but if you have more questions leave a comment.