OpenSIMPLY is free discrete-event simulation software — a reliable way to model complex systems.
Discrete-event simulation works by focusing only on the moments when something important changes — arrivals, departures, failures, completions — making it efficient and precise for queues, resources, workflows, and dynamic processes.
OpenSIMPLY is fully built on this discrete-event approach, giving you a clear and trustworthy tool for simulation tasks.
It is written in Object Pascal and compatible with Delphi and Free Pascal compilers.
The
open-source Lazarus IDE is a convenient choice for development and customization.
As
free discrete-event simulation software, OpenSIMPLY provides high performance — ideal for large-scale models, real-time applications, and precise scientific experiments.
It supports risk-free testing of scenarios: you can try changes, identify bottlenecks, optimize resource use, and predict system behavior without affecting real operations.
High speed and low resource consumption make it suitable for demanding tasks in emergency planning, security systems, industrial processes, and aerospace modeling.
The architecture is flexible — easy to extend with custom logic while keeping the core efficient and trustworthy.
OpenSIMPLY
Free open source simulation software
