Bookshelf
Vital Source Technologies
Bookmory - Трекер книг
Tony soft
Bookshelf-Your virtual library
SquidBit
Bookly: Book & Reading Tracker
SC TWODOOR GAMES SRL
Книжная полка FBReader
FBReader.ORG Limited
리딩앤
iPortfolio Inc.
Deseret Bookshelf
Deseret Book
Luna - Book & Reading Tracker
JGG Development
Cambridge Bookshelf
Cambridge University Press & Assessment
Turn - Reading Tracker & Timer
Jack Radford