An android e-book reader with cloud synchronization. Uses epublib for reading epub.
Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
An application to manage a collection of ebooks.
“epub-tools is a collection of open source (BSD) tools for generating and managing ePub documents”
I discovered this project after starting epublib. Found epublib easier to use.
EpubCheck is a tool to validate IDPF EPUB files. It can detect many types of errors in EPUB. OCF container structure, OPF and OPS mark-up, and internal reference consistency are checked. EpubCheck can be run as a standalone command-line tool, installed as a web application or used as a library.