Graphic Designer Toolbox (Mac only) offers the exact same features but based on a visual nodal structure they call blocks. This method enables anyone to see exactly what all was done in order in a non-destructive editing environment. It's an interesting way of organizing actions, something I've only seen in video compositing software.
I'm working thru the 30-day demo. Haven't made up my mind yet but I will say it's quite powerful and taps into OS X core graphic abilities. It's way faster than Photoshop but the workflow does take some getting used to. Ready to dive it? It'll only cost ya $42.94. Lemme know what you think.
