OpenRocket

OpenRocket is a free, open-source software developed by Sampo Niskanen and other contributors that allows users to design and simulate model rockets. The program uses a simple drag-and-drop interface to add components such as nose cones, body tubes, fins, and engines to a virtual rocket.

Within the program, users can adjust various parameters including dimensions of components, weight, mass distribution, center of gravity, and other flight characteristics. OpenRocket also includes a simulation feature that allows users to simulate rocket flight with different engine types and weather conditions.

Additionally, OpenRocket offers a library of pre-designed components and rockets for users to modify or use as inspiration for their own designs. The software is frequently updated and has a strong community of users who share designs and offer support.

OpenRocket is available for Windows, macOS, and Linux operating systems. It has been praised for its ease of use and powerful design capabilities, making it a popular tool among hobbyist rocket enthusiasts.