Bookmate!

Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and Android-based device. You can discover and read over 630,000 books in the Kindle Store, including the latest bestsellers and new releases.

Google Play Books lets you search, preview, and buy millions of books using Google Book Search. Books in the public domain and certain copyrighted books can be read and downloaded in their entirety for free. You can buy ebooks for reading on your computer, Apple device, Android device, Nook, or Sony eReader in the Google ebookstore. All purchased eBooks are backed up online, and your page positions are automatically synced between devices.

Scribd is a social publishing site, where tens of millions of people share original writings and documents.

Download NOOK, and get access to over a million eBooks, newspapers, magazines- all just a touch away. Plus, free samples of ebooks & thousands of free titles.

With Kobo, you can read on your iPad, iPhone or iPod Touch anywhere, anytime.

Freebook Sifter lists free eBooks from various sources. They update the list daily and you can find free eBooks from Amazon sites around the world, Kobo, Nook, Project Gutenberg.

Bookoid helps you select from a vast collection of books and easily manage your personal books library. Easily find the the book you want and also explore from a range of book listings. Build your library as you discover great books on the app.

You can upload your documents.

Forgotten Books is an independent publisher focusing on the rescue and restoration of old books. There are over 400,000 different books available on every topic from classic fiction, history, ancient knowledge, religion, spirituality, philosophy and many more. You can buy or download any book from www.forgottenbooks.com .