WoW (World of Warcraft) submits information from the server to the client. The client saves parts of this information inside the WDB folder to reduce network traffic (Infos about quests, items, npcs, etc). This program enables the user to read the info
Wolfpack is an open source server implementing the protocol used by the massive multiplayer online game Ultima Online. It aims for full support of the Ultima Online protocol and tries to mimic the same gameplay as the original.
ErisMUD is a MUD/MOO engine and server written in Python and SQLite and supports many features: it has rooms, chat, NPCs, items, player creation, ANSI colors, etc. Internal commands take care of the development and maintenance.