WriteFreely

WriteFreely is free and open source software for easily publishing writing on the web. Use it to start a personal blog — or an entire community.

Simple, yet powerful

We built WriteFreely to help you do one thing: get your words online. So we’ve removed as much friction as possible to help you do that. The application always opens to the editor, so you can start writing immediately and just press publish when you’re done.

Yet beneath our plain exterior is a robust, mature API, a hashtag organization system, encoded best practices for SEO, support for photos and videos, Markdown and MathJax rendering, and many features of any major blogging platform — unlocked with only a bit of plain text.

Free and open

WriteFreely is free and open source software, licensed under the AGPL. That means you can look under the hood and freely modify it to your liking.

https://writefreely.org

Authorea

Authorea is the leading collaborative platform to read, write, and publish research.

Authorea is founded in late 2012 with the mission of accelerating scientific discovery.
We were frustrated that other writing tools didn’t fully understand the needs of researchers — especially researchers in a web-first world — and we wondered why the internet age hadn’t yet delivered a modern toolset for scientific collaboration.

Authorea is the document editor we always wanted.

https://www.authorea.com

Atom Editor

Atom is a free and open-source text and source code editor for macOS, Linux, and Microsoft Windows with support for plug-ins written in Node.js, and embedded Git Control, developed by GitHub. Atom is a desktop application built using web technologies. Most of the extending packages have free software licenses and are community-built and maintained.

https://atom.io

Substance

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing systems.

https://substance.io/

Etherpad

Etherpad allows you to edit documents collaboratively in real-time, much like a live multi-player editor that runs in your browser. Write articles, press releases, to-do lists, etc. together with your friends, fellow students or colleagues, all working on the same document at the same time.

All instances provide access to all data through a well-documented API and supports import/export to many major data exchange formats. And if the built-in feature set isn’t enough for you, there’s tons of plugins that allow you to customize your instance to suit your needs.

You don’t need to set up a server and install Etherpad in order to use it. Just pick one of publicly available instances that friendly people from everywhere around the world have set up.

https://etherpad.org

Protégé

A free, open-source ontology editor and framework for building intelligent systems

Protégé is supported by a strong community of academic, government, and corporate users, who use Protégé to build knowledge-based solutions in areas as diverse as biomedicine, e-commerce, and organizational modeling.

https://protege.stanford.edu/

PanWriter

PanWriter is a distraction-free markdown editor with two unique features:

  • Tight integration with pandoc for import/export to/from plenty of file formats (including HTML, docx, LaTeX and EPUB).
  • Preview pane that can show pages – including page breaks etc. Layout adjustments are done in-file using CSS, and are immediately reflected in the preview.

Source: https://github.com/mb21/panwriter