lpsolve
Mixed Integer Linear Programming (MILP) solver lp_solve solves pure linear, (mixed) integer/binary, semi-cont and special ordered sets (SOS) models.
GNU Linear Programming Kit
The GLPK (GNU Linear Programming Kit) package is intended for solving large-scale linear programming (LP), mixed integer progr ...
LINDO
Classic LINDO's simple interface and straightforward model expression style make it easy to learn and use. Classic LINDO is ap ...
Linear Program Solver
An optimization package oriented on solving linear, integer and goal programming problems.