BeOS MIX
   Uses BFiles for 18 of 20 MIX I/O devices, each MIX I/O instruction spawns a Be thread to do operation while MIX keeps computing. Has MIX Go button, unlike some MIX emulators, coded in C++.
   http://www.bebits.com/app/3723/

Dan's MIX Simulator and MIXAL Compiler
   Assembler and interactive simulator in HTML and JavaScript; runs in web browser. For use if you are in haste to try MIXAL, or must code without installing an emulator.
   http://www.recreationalmath.com/mixal/

Donald Knuth: MMIX, a RISC Computer for the New Millennium
   Knuth describes MMIX 64-bit RISC computer to replace MIX as environment to teach machine level details in future editions of TAoCP; audio, video, text description, links. [Dr. Dobb's TechNetCast]
   http://technetcast.ddj.com/tnc_program.html?program_id=71

GNU MDK
   MIX Development Kit, emulates MIX, MIXAL; with compiler, virtual machine, GUI, Guile interpreter, Emacs mode, Elisp program to run programs in Emacs window.
   http://www.gnu.org/software/mdk/mdk.html

Home of MMIX Group Munich Professional School
   Mixed German-English site at Munich University of Applied Sciences. MMIX extensions: MMIXAL LaTeX output, Win32 graphical output.
   http://www.informatik.fh-muenchen.de/~mmix/

MIX
   Growing article, with links to related topics. [Wikipedia]
   http://en.wikipedia.org/wiki/MIX

MIX Builder
   Full development environment: editor, assembler, simulator, interactive debugger; all in one. Does all 157 MIX instructions: floating-point operations, card reader, card punch, line printer, typewriter, paper tape. For Windows 9x-Me/NT-2000-XP.
   http://www.charity-ware.org/Web_development/MIXbuilder.htm

MIX Emulator for Linux
   Compressed tar file, of "Swiss" MIX emulator, can be compiled for Linux, or modified for other Unix versions.
   http://swiss.csail.mit.edu/~adler/MIX/

MIX Simulator and Assembler
   MIX/MIXAL in C with Lex and CWEB documentation, in full Literate Programming style.
   http://home.telkomsa.net/dlaing/

MIXAL
   Eric Raymond's MIX Assembler and interpreter; downloads: readme, source tarball, HTML rendering.
   http://www.catb.org/~esr/mixal/

MMIX 2009: A RISC Computer for the Third Millennium
   Donald E. Knuth's new 64-bit processor for the new volumes of his landmark series 'The Art of Computer Programming'. MIX has become more than only a book example, so MMIX should too. Description, news.
   http://www-cs-faculty.stanford.edu/~knuth/mmix.html

MMIX-Trace
   Simplifies debugging programs; acts like normal debugger by reading tracefile, using information for nice Windows interface, moves forward, backward through code, many other functions.
   http://www.arno-fleck.de/mmix/english.htm

MMIXmasters
   Site for volunteers converting all programs in The Art of Computer Programming (TAOCP), Volumes 1-3, from old processor MIX, to newer MMIX: news, FAQ, mail lists, volunteer list and directions, links.
   http://mmixmasters.sourceforge.net/

MixNet
   MIXAL compiler for Microsoft .NET framework. Outputs .NET executable files. All source code is C#. [Public Domain]
   http://sourceforge.net/projects/mixnet/

Status of the GNU MMIX Tools
   GCC port of MMIX with tools, instructions to install, downloads, several links.
   http://bitrange.com/mmix/

Virtual Hardware for MMIX
   Brief satiric article, seemingly from 2009 Scientific American; some downloads: True Color MMIX display for X11, MMIXX Distribution, screenshots; links.
   http://www.malgil.com/mmix/