Photoforge
Finally, a legitimately powerful image editing app for iPad.  
The above image was a 10.7 MP RAW image, and though Photoforge couldn’t read the RAW data (that would be something), it was able to edit and export full-res, which I think is a first for iDevices.  It comes with a full slate of intuitive controls, including a proper Curves editor, HSL, Levels, White balance adjust, Noise removal, etc.  It all works the way it should, instead of suffering from the gimped or completely automated workflow that has become custom on iPad/iPhone.  But then the real kicker: layers and masking, making this easily the closest thing to a desktop Photoshop replacement out there.  
If there’s any gripe, it’s the speed, which is forgivable considering what it is trying to do.  Most adjustments will take 5-10 seconds to process (or at least that was the case in my tests, using data-heavy RAW files).  
The lack of RAW control keeps this from being a complete Photoshop replacement in my workflow, but I’m stoked to finally have a legitimate second option on the iPad.   High-res

Photoforge

Finally, a legitimately powerful image editing app for iPad.  

The above image was a 10.7 MP RAW image, and though Photoforge couldn’t read the RAW data (that would be something), it was able to edit and export full-res, which I think is a first for iDevices.  It comes with a full slate of intuitive controls, including a proper Curves editor, HSL, Levels, White balance adjust, Noise removal, etc.  It all works the way it should, instead of suffering from the gimped or completely automated workflow that has become custom on iPad/iPhone.  But then the real kicker: layers and masking, making this easily the closest thing to a desktop Photoshop replacement out there.  

If there’s any gripe, it’s the speed, which is forgivable considering what it is trying to do.  Most adjustments will take 5-10 seconds to process (or at least that was the case in my tests, using data-heavy RAW files).  

The lack of RAW control keeps this from being a complete Photoshop replacement in my workflow, but I’m stoked to finally have a legitimate second option on the iPad.