Gekko - Version 1.6 Gekko is a free time-series oriented software package for solving and analyzing large-scale economic models. Since 2009, Gekko is being used by Danish ministeries, banks, interest groups and universities, for the simulation of economic and energy-related models (more). The software runs under Windows (.NET), and is open source (GNU GPL).Some features:Timeseries-oriented software.Flexible data banks: annual, quarters and months.Dynamically loaded and compiled models.Gauss and Newton solvers, with ordering and feedback logic. Fair-Taylor solver for forward-looking models.Any number of simultaneous goals/means possible.Failsafe mode for simulation.In-built equation browser, with variable list.Decomposition of changes in equations.Double precision, missing values handled consistentlyExpressions accepted anywhere: in print, plot, etc.