resume-toolkit is a tool for converting JSON Resume (and optionally, BibTeX files) into HTML and PDF formats.
jsonresume-theme-eventide is a JSON Resume theme, derived from jsonresume-theme-even, which I extended for use with resume-toolkit with features like a Table of Contents, section reordering and custom labels, certificate and organization logos, and much more.
Ox-leanpub is a Leanpub book exporter for Org mode. It allows you to write your material entirely in Org mode, and manages the production of the files and directories needed for Leanpub to render your book. I use this package to publish my books.
Enwrite is a tool I wrote some time ago to publish a Hugo blog using Evernote. I don’t use it anymore since I switched to publishing my blog using Org-mode and ox-hugo, so it may be broken, but feel free to give it a try.
GrabCartoons is a comic-summarizing utility. It is modular, and it is very easy to write modules for new comics. It’s one of my oldest open-source projects, and still in use!