MATLAB MAT file I/O library. Matio is an open-source C library for reading and writing binary MATLAB MAT files. This library is designed for use by programs/libraries that do not have access or do not want to rely on MATLAB's shared libraries.
Library for reading and writing MATLAB binary files (aka MAT-Files) in LabVIEW. Currently works specifically with Version 7 MAT-File format. Written in pure G (LabVIEW source).