TinyFugue - MUD client

TinyFugue, aka "tf", is a flexible, screen-oriented MUD client, for use with any type of text MUD.

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Vallheru

Its turn based, web-browser, fantasy MMORPG written in PHP and MySQL (but may work with many other databases) with Smarty Template Engine, ADOdb and PHP Mailer. Based on Gamers-Fusion ver 2.5 with many modyfications in security, speed and features.
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PolskaOnLine

PolskaOnLine is multiplayer online 2D game using Java and SQL.
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Argentum Online

Argentum Online is an Open Source FREE 2D MMORPG, it has: guilds, magic, combat, animal taming, 21 skills, a huge world with towns and dungeons. Several races and professions. Client and server are distributed under Affero GPL v1.

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Crossfire RPG game

Crossfire is graphical multi-user 2d tile-based role playing game similar to Moria, Angband, Omega, Nethack, Rogue, Gauntlet, and Muds. The bulk of the game is based on predefined maps, however some areas are randomly generated.

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TinTin++ Mud Client

TinTin++ is a console mud client for any type of text mud or bbs. The mud client's main assets are an easy to learn scripting language, triggers that can contain regular expressions, and a split screen interface to separate mud output from client in

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Mudlet

A modern open source MUD client with a graphical user inteface and full built in Lua scripting support for all major platforms.

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