OpenRocket is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before actually building and flying them.
The main features include:
* Six-degree-of-freedom flight simulation
* Automatic design optimization
* Realtime simulated altitude, velocity and acceleration display
* Staging and clustering support
* Cross-platform (Java-based)
Read more about it on the [OpenRocket Wiki](http://wiki.openrocket.info).
OpenRocket is an Open Source project licensed under the [GNU GPL](https://www.gnu.org/licenses/gpl-3.0.en.html). This means that the software is free to use for whatever purposes, and the source code is also available for studying and extending.
OpenRocket needs help to become even better. Implementing features, writing documentation and creating example designs are just a few ways of helping. If you are interested in helping make OpenRocket the best rocket simulator out there, please [click here for information on how to get involved!](http://openrocket.sourceforge.net/getinvolved.html)
