InVision lets you transform your designs into beautiful, interactive web & mobile (iOS, Android) mockups and prototypes! Source: Free Web & Mobile Prototyping (Web, iOS, Android) and UI Mockup Tool | InVision
Customers Before Ideas: How Sam Ovens Signed Up Dozens Of Paying Users Before Building His ProductSam Ovens is a 23-year-old entrepreneur from New Zealand who had spent 12 months, and $10,000 of Source: Customers Before Ideas: How Sam Ovens Signed Up Dozens Of Paying Users Before Building His Product