Photoshop in your pocket: Adobe Photoshop Touch
Adobe has recently released Photoshop Touch for the mobile phone. Check out this video from Adobe highlighting all of the awesome things you can do with the new mobile version:
The interface of this pocket-sized version is supposed to be very similar to the tablet version of the app, introduced last year. See macstories.com for an extensive review of features and functionality.
This app looks like a must have for any photo buff or creative professional.