I am looking for a paint program for OS X that can handle the major formats out there with transparent layers and is free. (Windows formats: ICO, ANI, CUR support plus.)
Please provide link to download and also why you like the program.
I do not like GIMP. I am not looking to buy anything because I'm using a (long-term) borrowed MacBook.
EDIT:
Gimp does not have shape tools like paint or Paint.NET. That is why I dislike it.
To clarify: There is no "Square" or "Circle" tool. There is no "Rectangle with Rounded corners" tool.