PyGCS is a very stripped down MUD-like chat-server written entirely in Python. It has a single "room" and no large database to keep in memory and on disk. PyGCS has no embedded programming language.
...Among its features are network bridging/relaying, basic "infobot" capabilities, googling, 3 access tiers, and a shorter-link function. Pynfo is easily extensible and fully disk-persisten