Intel Math Kernel Library (Intel MKL) is a library of optimized math routines for science, engineering, and financial applications.
The IntelÂ® Math Kernel Library (IntelÂ® MKL) version 10.3 consists of three installation packages: Please register here using your product serial number.
I've been living under the impression that the Intel MKL weren't free.
Core math functions include BLAS
License FAQ | IntelÂ® MKL | IntelÂ® Software