Mooii Tech - 134KB (Free)
PhotoScape X for Mac is a well presented app for viewing and editing photos. It offers a whole host of tools that make viewing your favourite pictures a lot easier.
Although the user interface is basic in appearance, you do have the choice of several themes, which add a bit of colour and variety to this functional app. Once you click on an image, you can start editing straight away using common tools like Resize, Crop, Colour Adjustment, Eye Correction, Sharpen and Blur. Once you've finished editing you can then save your image in the same location or choose to save it separately. Photos can also be shared on social networks like Facebook, Twitter, Picasa and Flickr.
PhotoScape X for Mac also features a GIF creation tool, which is great when you consider you don't pay a penny for this application. You can also batch edit multiple photos and merge photos to create fun collages.
All in all, PhotoScape X for Mac is a very functional, photo editing app, that is a great alternative to iPhoto.