Have you tried Picasa
? I believe it can accomplish what you need, and it is free. I suggest clicking on the Take a tour of Picasa
link. It has all the information on what the program can do for you.
If you have and use a digital camera, it may have come with software that does many of these tasks. Also, if you bought your computer from a retailer such as Dell or Gateway, you may have gotten a version of Microsoft Works that may include Picture It! software, it is also another all-in-one picture editor. Just a little food for thought.
The GIMP and Inkscape are more for image rendering and creation than for picture tasks, but that is not to say that they can't be accomplished.
Hope this helps,