VirtualGL redirects 3D commands from a Unix/Linux OpenGL application onto a server-side GPU and converts the rendered 3D images into a video stream with which remote clients can interact to view and control the 3D application in real time.
Webcampak is a photography appliance. Used with DSLR or Compact cameras it can capture high resolution pictures, create timelapse videos and send those elements to remote servers. Extensively uses open source softwares (gphoto2, ImageMagick, ...)