Stellarium

I enjoy stargazing and astronomy generally, and have been meaning to buy Starry Night for a while. It’s just a little expensive for what it does, which is a shame. There have always been free alternatives, but never anything that shows you what the sky looks like from your location, without using an unintuitive fish-eye star map. The new Stellarium, however, looks pretty neat. It could do with a decent UI inside the program, but is fast, smooth and works well. Worth a look if you fancy planet-spotting.