CBC

CBC (formerly COINCBC) is a free solver for mixed integer nonlinear programs that arises from the COIN-OR project (Computational Infrastructure - Operations Research).  The COIN-OR project releases open-source software for the operations research community.  The GAMS/COIN-OR Link is available in source and free of charge with any licensed GAMS system.  The CBC (COIN Branch and Cut) solver was developed under the leadership of John Forest at IBM and is documented in a manual authored by John Forrest and Robin Lougee-Heimer at http://www.coin-or.org/Cbc/cbcuserguide.html.  A very brief GAMS related solver manual is available on Coin.pdf with more GAMS implementation related details including procedures to change the integer seeking branch and bound and cuts strategies at http://www.gams.com/gamscoin/.

An in core link exists and has the solver name CBCD.