I use Adobe Photoshop exclusively. I know it tend to be expensive, but it is
worth every penny. I use it EVERYDAY. I have other smaller graphic programs
(like PhotoDeluxe, etc.) that came with my scanners. I never use them because
they are so limited. I ALWAYS go back to Photoshop.
You can get Adobe Photoshop at an educational price $235. from Learning
Services. You can call them at 1-800-877-3278
They are a great company for educators. While you are on the phone request a
catalog. They have some very good deals.