OctoPrint is the snappy web interface for your 3D printer
FW for ESP8266/ESP8285/ESP32 used with 3D printer
An open source VR headset with SteamVR supports for $200
Dedicated to computer-aided engineering Linux distribution
Blender plugin slicer that generates gcode for CNC machines.
matterQ is a simple LPR 3D print server
GComb is a gCode viewing tool with an interior focus
Heatbed for SeeMeCNC H-1 3D Printer