My friends and I run the Music and Gaming Festival (MAGFest: http://magfest.org/ ) and for the past few years I've been tinkering with a webapp to help us get more organized. I've been to a lot of conventions, mostly anime conventions, and no one has a good integrated system for tracking attendees, staffers, shifts, events, inventory, budget, etc.

My webapp does all of this, and I've spent a lot of my free time lately making the code cleaner and easier to read. After the next MAGFest in early January I'm planning on releasing this webapp as an open source project on Sourceforge or somewhere similar.

I think a lot of other conventions might find this useful if they can find a programmer or sysadmin to make the small changes necessary to adapt the code for their purposes. I'm excited that some of our staffers are already planning on recommending this system to some of the other conventions they staff.