Sophie2

Sophie is software for writing and reading rich media documents in a networked environment. The program emerged from the desire to create an easy-to-use application that would allow users to combine text, images, video, and sound not only quickly and simply but with precision and sophistication. http://sophie2.org/

Sigil

Sigil is a multi-platform EPUB ebook editor (think Word or LibreOffice but specific for EPUB ebooks). https://sigil-ebook.com/  

Liquid Author

Author is a word processor featuring a minimalist environment with powerful controls. http://www.liquid.info/author.html  

Scrivener

Scrivener is a powerful content-generation tool for writers that allows you to concentrate on composing and structuring long and difficult documents. https://www.literatureandlatte.com/scrivener.php

Lexomics Tools

Introduction to Lexomics Lexos is a web-based tool to help you explore your favorite corpus of digitized texts.  http://wheatoncollege.edu/lexomics/lexos-installers/