: A widely used, reliable MIP solver often paired with Python modeling libraries. Nonlinear Programming (NLP):
: Currently considered the state-of-the-art open-source solver for LP. It features a high-performance interior point method and dual simplex solvers. Solver Software Open Source
: One of the fastest non-commercial solvers for MIP and Mixed-Integer Nonlinear Programming (MINLP). As of late 2025, major versions are available under the Apache 2.0 open-source license. : A widely used, reliable MIP solver often