as possible (for example via Python). This refactoring exercise allows WorldWind to be accessed via a browser as a Java Applet. A preview of the WorldWind Java SDK was released on May 11, 2007 during Sun Microsystem's annual JavaOne conference. Since WWj is an SDK, there is no single application; instead there are any number of applications using WWj, each with different functionalities, created by government agencies and commercial developers from around the world. These applications include simple virtual globe viewers, satellite tracker, GIS platforms, photo editor, F-16 simulator, mission planning software and many more. Android and the Web NASA has since released WorldWind Android and Web WorldWind, two SDKs for the Android OS and the JavaScript-based web apps. Like WWj, there is no single application for the versions. Tutorials NASA WorldWind SDK Tutorial: This Tutorial was developed by the Institute for Geoinformatics from the University of Münster, Germany. It contains tutorials from setting up an Eclipse environment with the WorldWind API to building polygons from Linked Open Data geographic datasets. It contains important tips from beginners to advanced developers. Forks and clones WorldWind Earth is a community that maintains friendly forks of the three current WorldWind SDK releases. They fork provide a release channel for builds based on the latest fixes and features from WebWorldWind's develop branch plus several "cherry-picked" enhancements from the WorldWind community. The WorldWindJS project is available on GitHub and releases are available on NPM. Geoforge project contains a fork of the NASA WorldWind project. Geoforge provides open source software. It leads in a platform that manages geosciences data and uses WorldWind features to provide a display of geo-localised geosciences objects. Dapple is a fork of the NASA WorldWind project, it is an Open Source project created by developers at Geosoft. Dapple is aimed at geoscience professionals, and has features aimed at them, such as easy addition of WMS servers and a simpler UI very similar to Google Earth's. SERVIR-VIZ is a customized version of WorldWind developed by IAGT for the SERVIR project. WW2D was a cross-platform, free and open-source application based on Java and OpenGL technologies and can be run on Microsoft Windows, Mac OS X, Linux (x86 and x86-64) and Solaris on SPARC. WW2D uses images from WorldWind's servers. WW2D Plus One - an update to WW2D providing a 3D view. Punt was a fork of the .NET NASA WorldWind project, and was started