Eduflow - Digital learning that actually teaches students something
On Slack by Standuply - The most extensive book on using Slack to the utmost
Padlet - Visual boards for organizing anything.
Startup Playbook by Hatch Quarter - A guide to building your startup
Flowlingo - Get fluent in a language through content immersion
Marketing for Startups - 47 practical tactics to get customers and achieve hockey stick growth.