E-book managers

Librum is a program for reading and organizing e-books. A free and open source program

Arianna is an application for reading and organizing e-books. A free and open source program

Koodo Reader is a program for reading and organizing e-books with the ability to synchronize and backup. A free and open source program

Alexandria is a minimalistic cross-platform reader for reading e-books. Free and open source program

Buka is a book manager with a simple and minimalistic user interface for organizing and reading PDF books

csBooks – manager and reader of eBooks in PDF, EPUB and MOBI formats

Bookworm – free and open source software simple, focused eBook reader for Linux

Polar – free and open source cross-platform software for organizing and reading PDF files, capture web content, with support for adding annotations

Foliate – free and open source simple and modern eBook viewer for Linux desktop

Lucidor – free and open source multitype software for reading and handling e-books