Firepad provides collaborative code and text editing. 

Firepad - Collaborative Text Editor Powered by Firebase

Alloy Editor is a modern WYSIWYG editor built on top of CKEditor, designed to create modern and gorgeous web content. It provides smart toolbars appear right near the selected text and offer different functionality based on context, Paste rich text from any web page and preserve its formatting, The full styling power of CKEditor and lot more.

Alloy Editor - WYSIWYG editor based on CKEditor with completely rewritten UI

Slate is a  completely customizable framework for building rich text editors. Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Google Docs—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity. It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React. It was inspired by libraries like Draft.js, Prosemirror and Quill.

Slate is a completely customizable framework for building rich text editors. Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Google Docs—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity. It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React. It was inspired by libraries like Draft.js, Prosemirror and Quill.

Slate - A completely customizable framework for building rich text editors

Draft.js is a JavaScript rich text editor framework, built for React and backed by an immutable model. Draft.js makes it easy to build any type of rich text input, whether you're just looking to support a few inline text styles or building a complex text editor for composing long-form articles.

Draft-js - A React framework for building text editors

tiptap is a headless, framework-agnostic and extendable rich text editor, based on ProseMirror. It gives you full control about every single aspect of your text editor experience. It’s headless and comes without any CSS. You are in full control over markup, styling and behaviour. tiptap works with Vanilla JavaScript and Vue.js, but it’s also possible to use it in React, Svelte and others. Real-time collaboration, syncing between different devices and working offline is supported.

tiptap - A headless, framework-agnostic and extendable rich text editor, based on ProseMirror

Open Live Writer is an open source application enabling users to author, edit, and publish blog posts. It is based on a fork of the well-loved but not actively developed Windows Live Writer code.

OpenLiveWriter - Helps to write, preview, and post to your blog

pell is the he simplest and smallest WYSIWYG text editor for web, with no dependencies. It can be easily customizable with the sass file (pell.scss) or overwrite the CSS. 

pell - The simplest and smallest WYSIWYG text editor for web, with no dependencies

Hallo is a very simple in-place rich text editor for web pages. It uses jQuery UI and the HTML5 contentEditable functionality to edit web content.The widget has been written as a simple and liberally licensed editor. It doesn't aim to replace popular editors like Aloha, but instead to provide a simpler and more reusable option.

Hallo - Simple rich text editor (contentEditable) for jQuery UI

Squire is an HTML5 rich text editor, which provides powerful cross-browser normalisation, whilst being supremely lightweight and flexible. Squire was written as a component for writing documents (emails, essays, etc.), not doing wysiwyg websites.

Squire - HTML5 rich text editor

ProseMirror is a well-behaved rich semantic content editor based on contentEditable, with support for collaborative editing and custom document schemas. Rich content editors should, ideally, produce clean, semantically meaningful documents while still being easy for users to understand. ProseMirror tries to bridge the gap between editing explicit, unambiguous content like Markdown or XML, and classical WYSIWYG editors.
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ProseMirror has built-in, ground-up, rock solid support for collaborative editing, where multiple people work on the same document in real time. It is modular architecture makes sure you only load the code you need, and can replace parts of the system as needed.


ProseMirror is a well-behaved rich semantic content editor based on contentEditable, with support for collaborative editing and custom document schemas. Rich content editors should, ideally, produce clean, semantically meaningful documents while still being easy for users to understand. ProseMirror tries to bridge the gap between editing explicit, unambiguous content like Markdown or XML, and classical WYSIWYG editors.



ProseMirror- A toolkit for building rich-text editors on the web

The Monaco Editor is the code editor that powers VS Code, which when combined with programming language services, gives you the power of an IDE and the speed of a text editor. It supports Rich IntelliSense, Validation for Javascript, Typescript, CSS, HTML. It also supports syntax coloring all languages.

Monaco Editor - A browser based code editor

A rich text editor framework for the web platform, with patches for browser inconsistencies and sensible defaults. For an introduction, you may want to read the blog post Inside the Guardian’s CMS: meet Scribe, an extensible rich text editor.

Scribe - A rich text editor framework for the web platform

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