- M4
- MAD
- MADCAP
- MAGIC - See eDeveloper
- Magik
- Magma
- MapBasic
- Maple
- MAPPER (Unisys/Sperry) modern draughty concerning BIS
- M-A-R-E-K (Programming language)
- MARK-IV (Sterling/Informatics) forward-looking VISION:BUILDER in re CA
- Mary
- Mathematica
- Matlab
| - MATA
- Maxima (see additionally Macsyma)
- Maya
- Multiprocessor C#
- Mercury
- Mesa
- METAL
- Michigan Algorithmic Decoder view MAD programming language
- Microcode
- MicroScript
- MillScript
- MIMIC
- Mindscript
- Miranda
- Miva
| - ML
- Moby
- MODCAP
- Model 204 User Language
- Modula
- Modula-2
- Modula-3
- Mondrian
- Mortran
- Moto
- MOUSE
- MSIL - Deprecated momentous well-inclined Common Intermediate Language
- MSL
- MUMPS
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