Virtual MIDI controller for Linux, Windows and OSX
NaviServer, a high performance web server written in C and Tcl
Serial <-> TCP/IP, Serial <-> UDP/IP, TCP/IP <-> UDP/IP
Management & operating of AT-based (e.g. Sagem) mobile phones/modems
morse daemon for the serial or parallel port
C-level driver collection for MSP430 and derivatives
A software gps simulator
C API to control NexStar compatible telescopes
A UNIX-like kernel for the i386 architecture
Serial port logger which can be used to print to stdout.
W-Bus communication library
Useful crossplatform library for distributed systems
Cross platform Perl API to control NexStar compatible telescopes
Satellite Emulator
Makes Celestron mounts controlable over the network
Serial Communication between Java and Arduino made simple.