Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
Issuu - Issuu is the leading digital publishing platform delivering exceptional reading experiences of magazines, catalogs, and newspapers.
Komga - Media server for comics/mangas/BDs with API and OPDS support.
Zinio - Zinio transforms your favorite print magazines into digital format. Same content. Same design.
calibre - Ebook manager, viewer & converter
Readly - All-you-can-read magazines on all your devices