Edvin Hopkins and I have updated to version 3.0 the catalogue of software for matrix functions that we originally produced in 2014 and updated in 2016. It covers what is available in various languages (C++, Fortran, Java, Julia, Python, Rust), problem solving environments (GNU Octave, Maple, Mathematica, MATLAB and associated toolboxes, R, Scilab), and libraries (Armadillo, GNU Scientific Library, NAG Library, SLEPc, SLICOT).

Here are some highlights of changes in the last four years that are reflected in the new version.

- Several new MATLAB third-party functions have been written, by various authors, notably for and for arbitrary precision evaluation of the exponential and logarithm.
- Matrix function support in Julia has been expanded.
- Armadillo, Rust, SLEPc, and Tensorflow are included in new entries.

In addition, all URLs and references have been updated.

Suggestions for inclusion in a future revision are welcome.