MadEdit-Mod is a cross platform Text/Hex editor based on MadEdit
General-purpose editor using subset of HTML5 as storage format
Twinkle is an open-source text editor.
PiNote is a free source code editor that supports several languages.
Foreign language reading and translation assistant
Markdown WYSIWYG Editor. GFM Standard + Chart & UML Extensible
Create markdown-based reveal.js presentations in Obsidian
An editor for structured documents
XML text markup for ancient documents
An Easy to use Browser Based MarkDown Editor With Live Preview Panel
EBook Generation Tools - scripts to create ebook formats EPUB, DOC
Run code interactively, inspect data, and plot
A hackable text editor for the 21st Century
Simple XML editor and XSD viewer
Free CAT tool based on OmegaT.
Pretty basic theme for Hugo that covers all of the essentials
An Anki plugin for Obsidian.md
Code editor in single HTML file