Acorn is an awesome image editor for the Mac. Use Acorn to edit photos, add filters, retouch pictures, paint, crop, add text, create new images, and much more!| flyingmeat.com
Hello, we are Good Enough. You’re good enough, too. We hope you are having a pleasant day, and will email us to say hello.| Letterbird
ImageOptim is excellent for publishing images on the web (easily shrinks images “Saved for Web” in Photoshop). It's useful for making Mac and iPhone/iPad applications smaller (if you configure Xcode to allow better optimization).| imageoptim.com