The NAG (Numerical Algorithms Group) library is a large collection of tried and tested numerical subroutines which may be called from within your own programs. The library is provided in a variety of languages (including MATLAB, C, Fortran and Python) and for a variety of hardware platforms. The University has a full site license for all staff and students.
According to the 2015 Fortran UK compiler comparisons, the NAG compiler was one of the best diagnostic compilers available. The University has a full site license for all staff and students.