ActiBook
Cloud CIRCUS, Inc.
Google Play 图书
Google LLC
Amazon Kindle
Amazon Mobile LLC
ReadEra – pdf, epub 电子书阅读器
READERA LLC
Bookshelf
Vital Source Technologies
eBoox ePub阅览器
REDIT, OOO
Everand: Ebooks and audiobooks
Scribd, Inc.
PocketBook 阅读
Pocketbook International SA
Library of Coding Books
Muslim Zabirov
Blinkist: Book Summaries Daily
Blinks Labs GmbH