closest_pair_brute, a Fortran90 code which uses brute force to solve a 2D version of the closest pair problem, which identifies the closest pair of points in a given collection.
The information on this web page is distributed under the MIT license.
closest_pair_brute is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.
f90_combinatorics, a Fortran90 code which considers a variety of problems in combinatorics involving counting, combinations, permutations, and so on.