The Stellarium Portable application was developed to be 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. It is being used in planetarium projectors. Just set your coordinates and go. Stellarium is the popular Stellarium astronomy program, so you can take your astronomical viewing settings with you.
PreviSat Portable is a satellite tracking software whose purpose is to help you monitor and observe the position of artificial satellites in real time. The tool is able to offer predictions about satellites’ passes and Iridium flares. It features a clean feature lineup where you can view the satellites on a world or sky map.