Board Thread:Support Requests - Getting Started/@comment-28931162-20170325232851/@comment-168424-20170327175604

GIMP is passable and I use it frequently, but as a long-time Photoshop user, it isn't really on par. GIMP is really great for free. GIMP runs on both Windows and Mac, but seems to have some memory leaks on Mac OS X.

Paint.net is pretty good (Windows-only) and you can also try pixlr.com/editor which runs in the browser (unfortunately Flash).