Well, you can do that with almost any very lightweight app, including apps costing like $10 and having hardware acceleration and everything, like Acorn and Pixelmator (examples on the Mac side) and also "be on to your next task".
You can even fully automate it (well, at least the resize, you'll still need to pick where to crop) with both.
You can even fully automate it (well, at least the resize, you'll still need to pick where to crop) with both.