Glose for Mobile - A social reader for ebooks, now on Android
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Project Gutenberg - Project Gutenberg offers free ebooks to download.
Oku - Track your book lists and get recs from your friends
Ritual Essential for Men - The scientifically-developed multivitamin for men
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes