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3. PintaPinta is a free pixel-based image editor for Mac OS X. One of the most interesting aspects of Pinta is that it is based on the Windows image editor Paint.NET. Pinta offers the basic drawing tools that you'd expect from an image editor, as well as some more advanced features, such as layers and a range of image adjustment tools. These features mean that Pinta is also a viable tool for users looking for an application to allow them to edit and improve their digital photos.
4. PixenPixen is a free (donation-ware) graphics editor for Mac OS X. It has been specially designed for pixel artists, but is also suitable for other types of pixel-based illustration and animation. It offers layers capabilities, animation features, a tile view, and features for working with restricted palettes. You can even assign a separate tool and color to the right mouse button.
5. Image TricksImage Tricks is a fun and easy to use free image editor for Mac OS X. It is an application that encourages experimentation and offers the ability for a wide range of effects to be combined and applied to pictures. It is an ideal application for less experienced users to achieve creative results, thanks to the range of filters and masks that are available. There is also a paid Pro version that offers more filters, though you can see the effects that they produce in the free version, without saving them.
7. PicasaTechnically, Picasa does not meet my criteria for a photo editor because it does not allow you to do pixel-level editing. However, I have received so many reader suggestions for Picasa, that I am including it here as an honorary mention. Although it does have some basic editing functions, it is primarily photo organizing software, and as such it is listed in my Top Digital Photo Software for Family Photos list.
8. ChocoflopReader-recommended Chocoflop has been discontinued, but it still available for free and runs on Leopard. Chocoflop offers non-destructive image editing, painting and selection tools, dozens of adjustment filters and effects, RAW support, rich text, and CoreImage filters support. Currently the only documentation for Chocoflop is a sparsely-populated wiki or the user forum so learning it may be a challenge if you have little photo editing experience.
Last Updated: August 2013