Frets on Fire (FoF) is a free, open-source Finnish music video game created by Unreal Voodoo. Players use the keyboard to play along with markers which appear on screen, with the aim to score points, achieve a high point multiplier, and complete a song. All items are free to view, share, and download. Read More

FlightGear is a flight-simulator created by an international group of volunteers, and released as free, open-source GPL software. It has been used for academic research, education, and for fun. All items are free to view, share, and download. Read More

FlightGear how-to download and install the latest version. FlightGear is a flight-simulator created by an international group of volunteers, and released as free, open-source GPL software. It has been used for academic research, education, and for fun. All items are free to view, share, and download. Read More

FlightGear Liveries are like paint schemes for aircraft. They tell you what airline they come from. This FlightGear how-to episode teaches you where to download and how install them. FlightGear is a flight-simulator created by an international group of volunteers, and released as free, open-source GPL software. It has been used for academic...

Flare is an open source, 2D action RPG licensed under the GPL3 license. Its game play can be likened to the games in the Diablo series. Using the modding interface, it’s possible to create entirely new games. On the Mods page, you can find games made by the Flare team, as well a few select community projects. All items are free to view,...

Freeciv is a Free and Open Source empire-building strategy game inspired by the history of human civilization. The game commences in prehistory and your mission is to lead your tribe from the Stone Age to the Space Age. All items are free to view, share, and download. Read More

Anim8or is a 3D modeling and character animation program. Here's an entertaining tutorial on animating a walk cycle. All items are free to view, share, and download. Read More

A squad-based tactical strategy game. All you need to play UFO Alien Invasion is a computer running Microsoft Windows or a supported version of Linux, and the installer from our website. All items are free to view, share, and download. Read More

It was shot almost entirely by astronauts on board the International Space Station in stunning IMAX quality. A Beautiful Planet provides an incredibly realistic glimpse into life on board, as well the true beauty of Earth as seen from space. Read More

Orbiter is a free and realistic space flight simulation program for the Windows PC. Orbiter gives you an idea what space flight really feels like. The concept is similar to traditional flight simulator software, but you are not limited to atmospheric flight. Orbiter allows you to experience manned and unmanned space flight missions from the...

Although it is optimized for 3D astronomical visualization, Celestia can be used to display and explore other 3D environments, too. The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X. All items are free to view, share, and download. Read More

Puppet science is a great way to keep kids excited about science and do safe and educational science activities! Perfect for preschool, kindergarten, and homeschool activities. You are free to download and share our list of learning activities. NASA Activity Downloads