GeoGebra is an app that's designed to scan and compile data from all the different satellite images being processed by the U.S. Department of Defense. This software was developed by a group of hackers, who are dedicated to preserving America's history and heritage. Since it's inception GeoGebra has been made available for free download on the Internet. That makes it one of the most popular online software applications.
As it's name suggests, the application allows you to download the data you're interested in. You can either search for your files through the program or let it load up a directory of files for you. Once you've downloaded the file, you'll need to install it onto your computer. Depending on your operating system you can either install it using the system tray icon or right on the desktop. Whatever you do, make sure that you're installing the application from a trusted source.
Aside from the software itself, the hardware requirements for this software are rather minimal. This is actually a great advantage because a lot of systems tend to get slow after too many downloads. With GeoGebra, it's possible to just run the program and everything will work as normal. In fact, many of these applications can do all the hard work for you. All you have to do is to browse the Internet and download the right application.