PEAR - Connecting newsletters and advertisers 🍐
NoteBear - Buy and sell class notes and get on-demand tutoring.
Buttondown - Buttondown is the best way to start and run your newsletter
Stanford Nerd - Text a Stanford student and get help
Revue - The easiest way to create and send a curated newsletter
Teech - 24/7 Unlimited help from the world's best students