Replacement for Microsoft Paint?

[a.b.olsen]

Is there any sort of free mac programs that are analagous to Microsoft Paint? When I used PCs more, I loved how easy I found Paint for doing tasks such as the following:
-Saving images from one file type to another
-Resizing images
-Creating simple diagrams
-Editing an image pixel-by-pixel
-Cropping images, etc.

Besides these tasks, one of my favorite features of Paint was its SIMPLICITY. I've found several programs that can do all this but they are far more complex.
Is there a mac program that offers all of these features in a simple, user-friendly context?

[texanpenguin]

Program like MS Paint?

[ex2bot]

And keep in mind that Preview can convert pics format to format.

Doug

[Thank The Cheese]

if you bought a mac new, you should have gotten iLife with it, therefore you have iPhoto. iPhoto allows you to do all those things and more (except for the diagram thing)