Zach has created an open source, Arduino-powered device that plays Astley's "Never Gonna Give You Up" whenever someone walks within 6 feet of the unit's ultrasonic sensor.
Proview is an Open Source Process Control System. It is modern, powerful and general and contains all functions normally required for successful sequential control, adjustment, data acquisition, communication, supervision, etc.
OpenSCAM is an Open-Source software which can simulate 3-axis NC machining. It is a fast, flexible and user friendly simulation software for the DIY and Open-Source community.