Alternatives to Koobits for all platforms with any license

calibre

Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e....

Free Open Source Mac Windows Linux BSD
Batch conversion Built-in e-Book converter Built-in viewer Customizable ... Auto update Book organization Built-in editor Built-in Adobe Flash Player Built-in PDF converter Custom cover image DRM Free Email notifications Facebook integration File-sync Handwritten Notes Indexed search Integrated PDF Viewer Live Push Notifications Live updating Multiple languages Open source software Portable Read fb2 format Rss to Kindle SMS Reminders Supports All Ebooks Format Sync with e-reader Update notifier Add a feature

1048 Like
Google Play Books

Google Play Books lets you search, preview, and buy millions of books using Google Book Search. Books in the public domain and certain copyrighted books can be read and...

Freemium Web Android iPhone Chrome OS Android Tablet ... iPad
Built-in translation File Searching Add a feature

129 Like
Document Viewer

A fork of the last GPL version of EBookDroid. Supports the following formats: PDF DjVu XPS (OpenXPS) Comic...

Free Open Source Android Android Tablet F-Droid
No features added Add a feature

30 Like
iBooks

iBooks is an amazing way to download and read books. It includes the iBookstore, where you can download both the latest best-selling books, and your favorite classics....

Free Mac iPhone iPad
Android Sync Built-in Commenting System Text Highlighting Add a feature

84 Like
Aldiko

Aldiko is an e-book reader application for the Android operating system. It supports the EPUB industry standard format for digital publications and incorporates...
- Discontinued Main site is dead. No updates since October 2018.
Freemium Android Android Tablet
Offline Reading Add a feature

53 Like
EPUBReader

EPUBReader is a Firefox addon which lets you read ePub-files just in the browser. You don't need to install additional software! If you click on a link to an...

Free Mac Windows Linux Chrome Firefox
No features added Add a feature

32 Like
ReadEra

Read book files in EPUB, PDF, DOC, DOCX, RTF, TXT, DJVU, FB2, MOBI and CHM formats. Supports chapters, bookmarks, page style. Saves the current reading position....

Free Android
Auto fetch album covers Fullscreen support Material design Night mode/Dark Theme Add a feature

10 Like
Calibre Web

Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks using an existing Calibre database.

Free Open Source Self-Hosted
OPDS Server Add a feature

9 Like
Foliate

A simple and modern GTK eBook viewer, built with GJS and Epub.js. Features View EPUB files Two-page view and scrolled view Customize font and line-spacing Light...

Free Open Source Linux
Easy installation Night mode/Dark Theme Add a feature

6 Like
BookFusion

eBook platform focused on openness that provides e-book library management and reader for users to upload & read their e-books across all devices while also allowing...

Free Web Android iPhone Android Tablet iPad
Cloud sync Disk Cloning Support for Docker Add a feature

8 Like
eBooks

eBook search engine.

Free Web
No features added Add a feature

3 Like
Book Collector

Collectorz.com Book Collector instantly catalogs your home library in a personal book database. Just enter enter ISBNs or scan ISBN barcodes and let Book Collector...

Commercial Windows
Barcode Database Add a feature

7 Like
Blio

Simply put, Blio is a full-featured eReader for people who care about what books look like. If you’re into crafting, architecture, cooking, traveling, or fairytales...

Freemium Windows Android iPhone Android Tablet iPad
No features added Add a feature

9 Like
Alfa eBooks Manager

The most powerful and easy-to-use Book Organizer Alfa Ebooks Manager is a free program that allows to organize your electronic and paper books in single e-Library.

Freemium Windows
No features added Add a feature

9 Like
Bookari

Fast and feature-packed ebook reader to get the most of your readings everywhere. User friendly advanced ebook reader for PDF and EPUB for leisure readers and students.

Freemium $ $ $ Android iPhone
No features added Add a feature

10 Like