I know their is gimp which is like photoshop and free, but is their one for illustrator?
Inkscape. You can find it here… http://www.opensourcemac.org/
removed by me
uhm.. try corel?
+1 for Inkscape, it’s excellent with a great user interface and feature set, and open source as well.
osalt.com is useful for finding free alternatives to a lot of applications. Here are the ones for Illustrator