Blinkist - Key insights from 6,000+ bestselling books and podcasts
Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
Sipreads - Takeaways from the best books, for free 📕⚡
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Four Minute Books - Making you smarter in 4 minutes or less.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.