These are Single-protocol Script-based (as opposed to Compiled) Servers, which will run on most operating systems equipped with the appropriate Interpreter.

JavaScript

Aftershock (ver 1.0.1) - Freeware


.NET v4.0

Gopher Cannon (ver 1.07) - Freeware


Perl

Bucktooth (ver 0.2.9) - Freeware


Python

PyGS (ver 0.3.5) - Freeware