Systems Tool Kit is described as '(STK) is a platform for analyzing and visualizing complex systems in the context of your mission. Interact with data from platforms across the aerospace, defense, telecommunications, and other industries' and is an app in the education & reference category. There are more than 10 alternatives to Systems Tool Kit for a variety of platforms, including Windows, Android, Linux, Mac and iPhone apps. The best Systems Tool Kit alternative is Stellarium, which is both free and Open Source. Other great apps like Systems Tool Kit are Celestia, Space Engine, Gaia Sky and Universe Sandbox.
Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.
Stellarium is the most popular Windows, Mac & Linux alternative to Systems Tool Kit.
Stellarium is the most popular Open Source & free alternative to Systems Tool Kit.
Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.
Celestia is the most popular Android, iPhone & iPad alternative to Systems Tool Kit.
Space Engine - a real-time 3D space simulator, procedural universe generator and visualiser. It lets you explore the universe in three dimensions, starting from planet Earth to the most distant galaxies.
Space Engine is the most popular commercial alternative to Systems Tool Kit.
3D visualization software for ESA's (European Space Agency) Gaia mission to chart about 1 billion stars of the Milky Way Galaxy.
Universe Sandbox is an interactive space simulator for Windows based PCs.
Unlike most astronomy software that just shows you what the sky looks like or where the planets are, Universe Sandbox is a powerful gravity simulator. You can add another star to our solar system and watch.
3D simulation of the Solar System and night sky - real time virtual orrery and observatory
Solar System Scope is the most popular Web-based & Android Tablet alternative to Systems Tool Kit.
Planetario contains a 3D model of our solar system. It will show the horizon and the planets in their path along the sky. The word planet comes from the Greek planetai, meaning "wanderers". Because of the rotation of the earth, the stars seem to move in perfect...
Stellarium Mobile is a planetarium app that shows exactly what you see when you look up at the stars.
Welcome to the Atlas of Space — an interactive visualization to explore the planets, moons, asteroids, and other objects in the Solar System.
Engage in space exploration and terraform new worlds in this fun and exciting planet building simulator rooted in real science. TerraGenesis dynamically animates entire planets with changing biospheres, all based on real data from NASA.
Orbiter is a realistic 3D real-time space flight simulator program.
Fed up with space games that insult your intelligence and violate every law of physics? Orbiter is a simulator that gives you an idea what space flight really feels like - today and in the not so distant future.
France
EU
United States
Russia
Germany
Slovakia
United Kingdom
Orbiter is a FS Sim, not an orbit toolkit!