Wikipedia4epub is a set of commands that constructs an offline e-book from articles on Wikipedia in EPUB format. There are commands to create an EPUB book from the articles from Firefox history file, or create an EPUB book from the given article and its children. It is useful for people with offline e-book readers.
Epublib is a Java library for managing epub files. It is capable of reading and writing epub files programmatically and from the command-line tool. Epublib consists of two parts: the core and tools. The core runs both on Android and a standard JVM. Tools require a standard Java environment. Other features include a builtin Swing-based viewer and comprehensive coverage of the epub standard, supporting the spine, the table of contents, and the guide. The API is designed to be as simple as possible, while at the same time making complex things possible too.
mdepub is a tool that allows you to compose a book in Markdown format and use Pandoc and Calibre to compile an Epub package including all of the book's source material. In effect, you can keep the source and product in the same file in your library; if you ever want to revise the product, you merely need to extract the source, make edits, and recompile.
osis2epub is a a program that converts a Bible text stored in Open Scripture Information Standard (OSIS) format to an EPUB book. The resulting eBook can then be read on various eReaders or converted to another format. Conversion to a simple text format and to a collection of HTML files with an accompanying stylesheet and file list (for direct viewing or subsequent conversion) is also supported.
The Cainteoir Engine is a library for reading and recording different document formats (ePub, HTML, MHT, RTF, email, and others) to various audio output formats (such as PulseAudio, WAV, and Ogg/Vorbis). It also provides the following command-line tools: cainteoir, a front-end to the Cainteoir text-to-speech library; metadata, which extracts metadata from documents to RDF tuples; and tagcloud, which generates tag clouds and tag cloud data.
zpub is a server to collaboratively work on DocBook-based documentation. Editors modify the XML sources with their preferred editor and submit their changes via Subversion. zpub renders the files centrally to various output formats, optionally notifies other editors, provides an archive of all previous revisions of the document, and supports a simple sign-off workflow. The documentation and user interface is currently only available in German.