Space simulation of our entire Universe. Generation is based on current Scientific documented beliefs. Completely Free!
Useful Tools for Sky Watchers
Realtime tracking of aircraft around the world.
Stellarium for PC and Mobile Devices
Stellarium is a free open source planetarium for your Computer and Mobile Devices ($2.99 on Mobile). It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. Augmented Reality is also available for Mobile Devices, just point your device at what's up there...
The UFO Detector is a free software that allows anyone to monitor the sky for UFOs day and night. If a UFO is detected the software automatically records a video of the event in the best possible quality.