LeggerePiace
DM Cultura S.r.l.
MLOL Ebook Reader
Horizons Unlimited srl
hoopla Digital
Midwest Tape LLC
Handy Library - 图书馆组织者
Handy Library team
Amazon Kindle
Amazon Mobile LLC
Google Play 图书
Google LLC
ReadEra – pdf, epub 电子书阅读器
READERA LLC
Audible – 亚马逊有声读物
Audible, Inc.
Libby由OverDrive赛阅提供
OverDrive, Inc.
PocketBook 阅读
Pocketbook International SA