Pebrot is an MSN messenger text client implemented with Python (needs Python 2.2 or higher). It also has a pretty curses-based interface.
TuxCall is a call waiting detector that hangs up the modem connection when a voice call arrives. It reads sound from modem's speaker (must be connected to audio line input) and kills pppd, allowing you to answer the phone.
A small graphical X11 file manager.
A full featured file system for Amazon S3 and other online storage services.