The Startup Way - The new book from Eric Ries, author of The Lean Startup
GrowthList - A crowd-sourced list of growth hacks
UI Playbook - The documented collection of UI components
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
50 UI Tips - Improve your UI/UX skills in an hour, for free
Growth Hack World - Together We Rise