tkMOO-light
- A unix/win/mac client geared toward MOO systems. Doesn't support ansi.
- http://www.awns.com/tkMOO-light/

WinMOOSE
- A port of MacMOOSE for Windows. Features MacMOOSE protocol support.
- http://www.cc.gatech.edu/elc/moose-crossing/winmoose/

tkMOO-SE Client
- Windows and Unix client featuring ANSI, MacMOOSE and MCP 2.1 editor and user plug-in support. It is fully customizable and is an active development, which is open to ideas and contributions, with open sourcecode.
- http://tkmoo-se.sourceforge.net/

Moops!
- Windows client featuring MCP 2.1 and ANSI support, editor with syntax highlighting, advanced history and paste and themes.
- http://www.beryllium.net/moops-en/index.php

MacMOOSE
- Macintosh client designed to aid MOO development in MOOs with MacMOOSE utils. Includes object browsers, WYSIWYG editing of verbs and properties, multiple connections and separate windows for help, sending MOOmail and the output of any command.
- http://www.cc.gatech.edu/~asb/MacMOOSE/

VMoo
- Features an editor, visual who-listing (requires code installed in server), ANSI, MCP and TCL support, built-in MOO code parser, triggers and an integrated list of MOO servers.
- http://www.vmoo.com/en/

gmoo
- Linux client based on gtk+ supporting multiple worlds. It includes a builtin editor with syntax-highlighter and macro support, is almost completely customizable and includes MCP support.
- http://www.luon.net/~gert/