Software

ServoMaster
Computers, Robotics, Software, Control - ServoMaster. A platform independent servo controller driver compatible with FerretTronics and Phidget boards.
https://servomaster.sourceforge.net/
autopilot: Do it yourself UAV
Computers, Robotics, Software, Control - Autopilot. A complete Unmanned Aerial Vehicle (UAV) control system with 3 axis IMU/INS+GPS.
https://autopilot.sourceforge.net/
The Orocos Project
Computers, Robotics, Software - The Orocos Project. The Open Robot Control Software Project aims to develop an architecture-independent component based framework for all aspects of robot control.
https://www.orocos.org/
Player Project
Computers, Robotics, Software - Player/Stage. Player is a language and platform independent network server for robot control.
https://playerstage.sourceforge.net/
The Rossum Project
An Open-Source Robotics Software Project (Contributors Welcome)
https://rossum.sourceforge.net/