Free Adobe iPad app for creating comps. Video at the link.
Built on the Adobe Creative SDK, Comp CC couples intuitive iPad gestures, fonts from Typekit, and the personal assets stored in Creative Cloud Libraries to provide designers with the perfect mobile brainstorming and layout work surface. Then, with a single click, comps can be sent to Adobe InDesign CC, Adobe Illustrator CC, or Adobe Photoshop CC (where CC Libraries assets and fonts from Typekit are also synced) to fine-tune and finish the work. It’s this powerful connection back to the desktop, where designers do so much of their work, that makes Comp CC, and all of our mobile apps, so valuable.