Energy3D is available for free download in two ways Web Installer and Zip Installer. The Web Installer uses the Java Web Start technology to automatically download and install Energy3D to your computer. If you run into any problem with the Web Installer (for example, you have disabled the Java plugin in your browser), please use the Zip Installer.
Note on recent Java security problems: Energy3D is a desktop app that does not run within a browser. You can download it and run it offline safely.
Energy3D is licensed under the GNU Lesser General Public License V3.0 and based on the Open-Source Java 3D graphics library Ardor3D.