Layer 3/4 packet forwarding software that utilizes the Linux kernel's XDP hook. The XDP hook allows for very fast network processing on Linux systems. Uses source port mapping similar to IPTables and NFTables.

Easily portable DooM for Python (+ some pretty sick demos)

portable quake

An enhanced sourceport of Rise of the Triad, based on SDL3

Prey 2006 SDK integrated with Doom 3 GPL release

it opens a port and start listen on it and then forward the traffic to a remote proxy. A source port can be set on the outbound connection