DWSIM is a versatile and free chemical process simulator that adheres to CAPE-OPEN standards, functioning seamlessly on multiple operating systems like Windows, Linux, macOS, Android, and iOS. Its user-friendly graphical interface allows for features that were once only available in paid software. The simulator excels in both steady-state and dynamic modeling by employing a parallel modular solver for enhanced efficiency. Additionally, DWSIM comes equipped with sophisticated property packages. Users can access an extensive array of unit operations, such as mixers, splitters, separators, pumps, compressors, expanders, heaters, coolers, valves, pipe segments, shortcut columns, heat exchangers, a variety of reactors, distillation and absorption columns, solids separators, and cake filters, alongside spreadsheets, Python scripts, and flowsheet unit operations. Furthermore, it includes an Excel Add-In for executing thermodynamic calculations directly within spreadsheets, as well as an automation API that facilitates the creation, modification, execution, and saving of flowsheets, making it an all-encompassing tool for chemical engineering. With its robust capabilities and user-centric design, DWSIM stands out as an invaluable resource for professionals in the field.