Download of MudWalker 0.3 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Games, more precisely Adventure. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
MudWalker is an in-development open-source MUD client for Mac OS X.
Compact connection windows that use no unnecessary screen space. Supports Telnet, MCP, ANSI color, and TWin protocols. Full support for extended character sets, including Unicode and Windows encodings. Scripting using the Lua programming language. Automatic login scripts with support for multiple accounts. Command aliases. Automatic logging.
You may want to check out more Mac applications, such as NinjaQuestX, Hallowed Legends: Samhain Collector's Edition or Kid Mystic, which might be related to MudWalker.