Compiling a list of tools, native apps as well as cloud-based, to help build compelling Mobile (and Desktop) App prototypes. | UXPin: UX Design & Wireframing Tools As Beautiful As Your Work, Pixate, Origami from Facebook, Framework7, and Free Web & Mobile (iOS, Android) Prototyping and UI Mockup Tool | InVision
Via malek
A great starting point for those thinking about apps and how they can be leveraged
See and try
Nice list. Check this out.