GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Big Huge Labs Writer - Writer is a free online distraction free writing environment provided by Big Huge Labs.
MkDocs - Project documentation with Markdown.
Scribes - A text editor for GNOME that combines simplicity with power.
Docusaurus - Easy to maintain open source documentation websites
Caret - Better Markdown Editor for Mac / Windows / Linux