Stellarium Desktop Planetarium

Stellarium is a fantastic piece of freeware used by many astronomy clubs and planetariums. It’s 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.

Registax Imaging Software 

Registax is a free image stacking and processing program  for astrophotograhers . Widely used by both armature and professional astronomers worldwide.

DeepSkyStacker

DeepSkyStacker is a freeware for astrophotographers that simplifies all the pre-processing steps of deep sky pictures.

• Registering

• Stacking

• Simple post-stacking processes to quickly view the final result.

• Saving the resulting image to a TIFF or FITS file (16 or 32 bit)