Foxit Reader is a lightweight, fast PDF Reader.

Google Play Books (formerly Google eBooks) is an ebook digital distribution service operated by Google. Users can purchase and download ebooks from Google Pla…

iBooks is an e-book application by Apple Inc. for its iOS and macOS operating systems and devices.

Notebooks is a note taking and task management app.

Adobe Acrobat Reader DC is the industry standard for viewing, printing, signing and commenting on PDF documents.

ComicRack is a comic reader.

Notability is a powerful, yet wonderfully simple note-taking and PDF annotation.

colwiz (collective wizdom) is free web, desktop and mobile based research management software.