c64-network.org is a networked version of the Frodo emulator, where you can play C64 games against other people over internet. It also has a port to Nintendo Wii and a custom GUI with game information, a virtual keyboard etc.
Detox64 is an application which translates C64 BASIC files to readable text.
A Web-based document management system.
A GUI to ease the process of producing a multipage PDF from a scan.