Recent news:
21.03.2014: Version 14.03 is released! This release contains the new photo realistic renderer (in the Tools menu) which allows one to visualize the rocket in the air. There are various bug fixes in the configuration and motor selection windows as well.
01.01.2014: Version 13.11.2 is released! This release contains bug fixes, usability improvements, and layout fixes.
15.11.2013: Version 13.11.1 is released! This release contains bug fixes including fixing Tube Coupler configuration, various exceptions in the flight configuration tab, updated 3d libraris (which didn't really make it into previous versions).
8.11.2013: Version 13.11 is released! This release simplifies flight configurations by replacing the dialog with the configuration tab. Motor filtering in the motor chooser dialog has been enhanced. Chineese translations have been added and Russian translations updated. Updated the 3D libraries, and squashed some bugs introduced by Java 1.7.0_45-b18.
Ready packages
These are packages ready for use and are the recommended download for normal users. They are pre-packaged with motor thrust curves from thrustcurve.org.
OpenRocket requires Java version 6 or later. The Sun Java Runtime is recommended.
Desktop version
This is the latest version of the desktop version of OpenRocket. It contains the latest and greatest features, and runs on any system supporting Java.

OpenRocket can be started in most graphical environments (including Windows) by double-clicking the package icon. No installation is required.
From the command line OpenRocket can be started by java -jar OpenRocket-14.03.jar
Android version
The Android version allows opening OpenRocket files, viewing simulations and motors. Later versions will allow running simulations as well.
The Android version is thanks to the fantastic work by Kevin Ruland.

Installation:
- Go to Settings → Applications and check Unknown sources.
- Download OpenRocket-Android-12.09.apk on your device and accept installation.
Source code and older versions
Source packages and older versions of OpenRocket are available in the SourceForge repository.
Alternatively, the most recent development version can be obtained from GitHub. The code can be retrieved using the command
$ git clone git://github.com/openrocket/openrocket.git
The above URL may be used to connect to the repository with other Git clients as well.