Found this Ukrainian company called MitriDAT because I was searching for a pre-built web application. I wouldn’t normally post an outsourcing company like this but really liked the interface work they do. Check out Form Builder Pro which has a really nice interface. I think the font on their website is way too small.

Here’s a simple event registration system from CodeWidgets.com (ASP).

Here’s a neat little PHP app that might be useful to someone. It’s basically a booking engine system and you could use it to book conference rooms, tennis courts, or virtually anything.