Startup Stash - A curated directory of 400 resources & tools for startups
Startup Playbook - Written by Sam Altman & Illustrated by Gregory Koberger
Content Marketing Stack - A curated directory of content marketing resources
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
StartupResources.io - Tightly curated lists of the best startup tools
Founder Institute - Since 2009, the world’s fastest-growing startups have used the Founder Institute to raise funding, get into seed-accelerators, generate traction, and more.