Alternatives to FBReader
Cross-platform ebook reader supporting EPUB, FB2 and Readium LCP. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
FBReader
Cross-platform ebook reader supporting EPUB, FB2 and Readium LCP.
Replacements
Listings that take over the same core job as FBReader.
Koodo Reader
A modern ebook reader for fifteen-plus formats that syncs your library and reading progress through storage you already own.
Koodo Reader is free and open source under AGPL-3.0, covers desktop, Android, iOS and web, and syncs through storage you configure yourself instead of paid add-ons.
Readest
A modern ebook reader for EPUB, PDF, MOBI and comics, with highlights, notes, translation, text to speech and sync across every platform.
Readest is open source under AGPL-3.0 and reads EPUB, PDF, MOBI, FB2 and comics, but its cloud sync is a hosted service with paid tiers.
KOReader
A reader you install on a Kindle, Kobo or PocketBook that opens the formats the stock software refuses.
KOReader runs on e-ink hardware such as Kindle and Kobo plus Android, is free under AGPL-3.0, and also reads OPDS catalogues, but has no official iOS build.
Foliate
A calm, well-made GTK ebook reader for Linux that stores your notes as plain JSON you can sync yourself.
Foliate is free and open source and reads EPUB and FB2 with plain JSON annotations, but it runs only on Linux.
Thorium Reader
Read EPUB books with an accessible desktop reader.
Thorium Reader is a free BSD-licensed desktop EPUB reader for Windows, macOS and Linux focused on accessibility, with no mobile apps.
Similar software
Related functionality, not a direct replacement.
Calibre
The ebook library manager: view, convert, edit and catalogue books in every major format, and talk to e-readers.
Kavita
A self-hosted reading server for ebooks, comics and manga, with readers built for each format and OPDS for everything else.
Libby
Borrows ebooks and audiobooks from a local library for free with a library card.