YC Startup Class - A live, one-hour class by Sam Altman on Platzi
Startup Playbook - Written by Sam Altman & Illustrated by Gregory Koberger
CS183B - Startup Class - Stanford class taught by Sam Altman & guest speakers
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Radiohere - Hand curated multi lingual online radio stations
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.