Free (and cheap) Art ProgramsUpdate: 8/9/2012 - Redid review format. Added MangaLabo and Manga Studio.More Like This
Photoshop is a great program, but despite it's many features it's a bit pricy at $999. I created this list for people with smaller wallets and certain art needs.
The programs are listed according to what type of art they are best suited for.
Don't know what program will be best for you? Most of the paid programs have trial versions available, download them and see what you like best.
openCanvas | Screenshot
Price: 79 USD
Pros: ability to customize brushes, ruler tools, user-friendly interface, some built-in screen tones. Can create "event" files, where others can watch you drawing long after the fact. Updated regularly.
Cons: Not as many drawing/painting tools as other programs, is somewhat limited out of the box.