Recent news:
28.9.2012: Version 12.09.1 is released! This is a bug-fix release, fixing numerous bugs introduced in 12.09. The only new feature is the option to automatically open the latest design file on startup (in Edit → Preferences → Options).
23.9.2012: Version 12.09 for Android is released! The major improvement is the possibility to edit simulation parameters, thanks to work by Kevin Ruland.
16.9.2012: Version 12.09 is released!
This version contains a huge number of new features by many contributors:
- 3D rocket design view
- Component Presets
- Custom expressions in simulations
- Printing for centering ring and clustered centering ring components
- Support simple arthmatic in dimension entry
- Support deploying recovery device at stage separation
- Support for fractional inches (1/64) for unit length
- Added preference for windspeed units separately
- Added "most recently used files" in File Menu
- Improved printed accurracy in fin marking guide
- Calibration rulers added to printed templates
- Translations in Czech and Polish, numerous updates
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-12.09.1.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 the SVN repository. It can be retrieved simply using the command
$ svn co https://openrocket.svn.sourceforge.net/svnroot/openrocket/trunk OpenRocket
The above URL may be used to connect to the repository with other Subversion clients as well.