Constraint Solvers
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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning.
Last Release on Mar 28, 2026
Open-source constraint solver.
Last Release on May 6, 2026
Timefold solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning.
Last Release on Apr 22, 2026
A Scala front-end for the JaCoP constraints solver library
Last Release on Feb 9, 2026
Finite domain solver written in java.
Last Release on Nov 18, 2023
Java Constraint Programming solver (fork)
Last Release on Sep 1, 2018