mixal was an assembler and interpreter for Donald Knuth's mythical MIX computer, defined in: Donald Knuth, "The Art of Computer Programming", Vol. 1: Fundamental Algorithms_. Addison-Wesley, 1973 (2nd ed.)

The mixal project has been terminated and mixal replaced by GNU MIX Development Kit, alias MDK. All the MIXAL material contributed by Donald Knuth and myself is now included in MDK.