FlexSim is described as 'Is simulation software that models, simulates, predicts, and visualizes systems in manufacturing, material handling, healthcare, warehousing, mining, logistics, etc' and is an app in the sport & health category. There are seven alternatives to FlexSim for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best FlexSim alternative is Anylogic. It's not free, so if you're looking for a free alternative, you could try JaamSim or realvirtual. Other great apps like FlexSim are Simio, SIMUL8, Arena Simulation Software and Simile.