Fast Image Resizer
Full user review
"Best I've ever seen,easy to use,perfect outcome."
It's small,sits on your desktop unobtrusively,always ready to be used.
It doesn't go below 600x600,there are times when I need it to be a little smaller.
All in all,this is the best image resizer out there.I'm not that much of a technical person,but this is really easy to use,just set the size you want,drag the thumbnail into the resizer,and in less than 11.88 seconds,it's done.They "say" it's 11.88 seconds,but I think it's more like 5 seconds.