GIMP and Paint.net are terrific, and free. Google one.
I use Photoshop, but it costs money, so you're better off with those two choices.
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"Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that there is more stupidity than hydrogen, and that is the basic building block of the universe." -Frank Zappa
I use Photoshop, but it costs money, so you're better off with those two choices.