SmallDevTools - Handy developer tools with a delightful interface
Airschool - Airschool is a live-streaming educational platform with engagement and monetization tools to help anyone start teaching online. It can be finance, business, wellness, meditation, branding, marketing; in short, anything you want!
whatdevsneed - This is whatdevsneed.
Alcamy - Free, open self-learning platform. Learn & teach anything.
Google Open Source - All of Googles open source projects under a single umbrella
Stacks - A bookshelf for your online courses