Bookself - The social reading app 📚💬
Commit Together by Github - Now add co-authors to your commits
Reese’s Book Club - Every book, everyone’s invited
Commit Print - Posters of your git history
Four Hour Book Club - 300+ Books recommended on the Tim Ferriss Show 📚
gitbird - So, I don't always remember to tweet what I do, but commit my code often, and what do users love more than your product?