bargain workhorse
I have used GC for many many years. It has proved incredibly useful side by side with many other image manipulation programs - sometimes you just dont need a jackhammer when a screwdriver will do the job quickly and easily. It handles image files formats youve never heard of (but when you hear of them, you need to open them now). And it can do SO MUCH with pictures, so easily. Authors support is very good also.
lots_of_apps about
GraphicConverter