tty0tty is a kernel-module virtual serial port driver for Linux.
Universal server
Anti Spam SMTP Gateway
IPsec / IKEv2-based VPN software for Linux.
Petidomo is a small, easy-to-administer mailing list server
Makes Celestron mounts controlable over the network
Virtual ATA over ethernet (AoE) target for Linux
The IRC's Talking Robot
Lightweight DriveWire Server
Simulate Bluetooth connections over TCP/IP