GLPK - intended for solving large-scale linear programming

The GLPK (GNU Linear Programming Kit) package is intended for solving large-scale linear programming (LP), mixed integer programming (MIP), and other related problems. It is a set of routines written in ANSI C and organized in the form of a callable library. GLPK supports the GNU MathProg modeling language, which is a subset of the AMPL language. The GLPK package includes the following main components: primal and dual SIMPLEX methods primal-dual interior-point method branch-and-cut method translator for GNU MathProg application program interface (API) stand-alone LP/MIP solver