Earlier this year Ukefarm entered into a partnership with EUMLab to develop Chordtunes for iPad. Chordtunes creates chord sheets for guitar, ukulele, and mandolin. You can think of Chordtunes as a text editor for creating chord sheets. It supports six tunings, transposition, three PDF formats, a custom chord keyboard, and Dropbox support.
Visit the EUMLab site for more information.