Startup Playbook - Written by Sam Altman & Illustrated by Gregory Koberger
Going Indie - A complete guide to becoming an indie software developer
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Commenze - Fully customizable comment sections for any website
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.
Dotarchy - Pick a topic, discuss it, make some Friends