offrss is a standalone program that can download your favorite feeds and then show them in your favorite Web browser by spawning a simple local Web server. It will not only download the feeds' text, but also the pictures, so you will also be able to read comics strips and enjoy posts with pictures in them while offline. It can also generate PDFs from text. It remembers what you read and what you don't, and all the information stays in normal files, so you can synchronize it easily to any device that may not have an Internet connection. It can also work as a CGI to serve your feeds in your Web site, and it can update the feeds from crontab. It has few dependencies to build and can be cross compiled easily.
gPDFText is a text editor that opens PDF documents for ebook readers, converts the text contents into plain ASCII text, restores the original paragraphs, and removes unwanted line breaks to allow easier zooming on the reader. The text is loaded into a text editor with spell-checking support and can then be saved as a reformatted PDF in A5, B5, or original A4 size.
Ubooquity is a lightweight and easy-to-use home server for your comics and ebooks. It allows access to your files from anywhere, with a tablet, an e-reader, a phone, or a computer. Ubooquity offers a Web administration page (if you prefer to do everything through your browser), user management with secured access (to decide who can see what), and an online comic reader (to read your comics without downloading huge files), and it supports many types of files, with a preference for epub, zip (cbz), rar (cbr), and PDF files.
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.
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.
Book Manager is intended to provide a simple interface to manage a collection of e-books. Users can also view their e-books, as well as many other files in tabs. With the collection disabled, Book Manager can also be used as a tab-supporting shell for the popular KDE PDF reader Okular.