Amid a myriad of prototyping tools, POP, an iPhone app made by Woomoo, has effectively popped right into my homescreen as an insanely useful way to explore user experience problems and share iPhone app concepts with others. Simply sketch out your idea, take a few pictures and then link buttons to create a functioning mock-up that can be shared across Twitter, Facebook, messages and email. (via POP: This iPhone app is every designer’s missing puzzle piece for prototyping on paper - The Next Web)
