LPSOLVE is an excellent open source solver for mathematical programming problems. It can be used for linear (LP), integer (IP) and mixed integer linear (MILP) problems. It is distributed under the GNU ...
About lpsolve python extension for python 2.x and python 3.x. The lpsolve extension is ported to python3.x so that it works on both python2.x and python3.x. porting-to-python3 lpsolve ...