Have you ever wondered why people are bouncing from your nearly-frictionless onboarding flow? Why the same change can result in a lift on one page and cause drop-off on another? Or why people who find you via search bounce away after a few moments?
In a break from my philosophical focus, here are some tools that helped me build PhotoSugar and SnapButler:
Balsamiq — Rapid wireframing tool to communicate design concepts. $79
HackDesign — Learn-to-Design lessons for non-designers. Free