We just committed a C version of the pixelvloed server to github. It can be easily compiled on a raspberry Pi zero (or similar device) and is fast enough to turn any old CRT display into a multiplayer canvas. If you use the pi2vga board by mincepi you can create a self contained system for just a few euro's/dollars. At the moment the C version does not yet to pixel scaling and does not broadcast its version/ip/port and resolution yet.