GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Commit Together by Github - Now add co-authors to your commits
Read This Twice - Verified book recommendations from people we look up to
Commit Print - Posters of your git history
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
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?