Several software options are recommended for creating flowcharts of chemical plants, including ChemCAD, Microsoft Visio, Aspen Plus, and HYSYS. ChemCAD is noted for its simulation capabilities, while Visio is recognized for its schematic design features, though its symbol libraries may be limited. Aspen Plus and HYSYS are also suggested for their comprehensive process simulation tools. Users should consider their specific needs regarding symbols and simulation when choosing software. Overall, these programs provide a range of functionalities suitable for chemical process engineering flowchart creation.