Frontline Solver
Premium Solver Platform for Excel is a Office Tools software developed by Frontline Systems. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Premium Solver Platform for Excel:BSEditor: We offer Excel Solver upgrades for several types and sizes of optimization problems.
A modelling tool that we think improves on the built-in Solver window; OpenSolver has been developed for Excel 2007/2010/2013/2016 (including the 64bit versions) running on Windows, and supports Excel for Mac 2011 on Mac OS X, with limited support for Excel for Mac 2016.
But our best-selling product is the Premium Solver Platform, in part because it can handle every type of problem up to certain size limits:Linear and quadratic programming problems up to 8,000 variablesand mixed-integer programming problems up to 2,000 variablesnonlinear, global, and nonsmooth optimization problems up to 500 variablesAnd you'll want the Premium Solver Platform even if your problem is larger than these limits, because it is the base or 'platform' that all of our larger-scale Solver Engines 'plug into.' If your problem grows in size, you can easily add one or more Solver Engines to the Premium Solver Platform at any time. Think your model is too big? Don't worry - some of our users have linear programming models with millions of decision variables!