LexisNexis® Digital Library
OverDrive, Inc.
Libby由OverDrive赛阅提供
hoopla Digital
Midwest Tape LLC
cloudLibrary
OCLC
Barnes & Noble NOOK
Barnes & Noble
Bookshelf
Vital Source Technologies
Audible – 亚马逊有声读物
Audible, Inc.
BorrowBox Library
Bolinda digital
Sora,由OverDrive Education出品
PocketBook 阅读
Pocketbook International SA