Quill is a modern rich text editor built for compatibility and extensibility. It was created by Jason Chen and Byron Milligan and open sourced by Salesforce.com. It provides granular access to the editor's content, changes and events through a simple API. It works consistently and deterministically with JSON as both input and output.

Quill - Your powerful, rich text editor

Trix is a WYSIWYG editor for writing messages, comments, articles, and lists—the simple documents most web apps are made of. It features a sophisticated document model, support for embedded attachments, and outputs terse and consistent HTML. 
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Trix is an open-source project from Basecamp, the creators of Ruby on Rails. Millions of people trust their text to Basecamp, and we built Trix to give them the best possible editing experience. See Trix in action in the all-new Basecamp 3.

Trix is a WYSIWYG editor for writing messages, comments, articles, and lists—the simple documents most web apps are made of. It features a sophisticated document model, support for embedded attachments, and outputs terse and consistent HTML. 

Trix - A rich text editor for everyday writing

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

The Suneditor is a lightweight, flexible, customizable WYSIWYG text editor for your web applications. It has support to Embed images, Videos, Image resizing and rotation, Upload images to the server, Image gallery, Tables and lot more. It has support to use CodeMirror and KaTeX. 

SunEditor - Pure Javascript based WYSIWYG html editor, with no dependencies

TinyMCE is a platform independent web based Javascript HTML WYSIWYG editor control. It has the world's most advanced rich text editor has all the features developers are looking for. It has support for Images, Image resize, Auto save, BBCode, Code, Color picker, Full screen, Spell checker, Media, Table, Table of contents, Word count, Visual Blocks and lot more.

TinyMCE - The world's #1 JavaScript library for rich text editing. Available for React, Vue and Angular

A JS library for building WYSIWYG editors for HTML content. It is one of a collection of libraries designed for building tools that make it easier to edit HTML content. It is framework agnostic, The library doesn't use any JavaScript frameworks (no JQuery) but plays nicely with any of them. 

ContentTools - A beautiful & small content editor

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

A beautiful Javascript WYSIWYG HTML rich text editor. High performance and modern design make it easy to use for developers and loved by users.

Froala Editor - A beautifully designed WYSIWYG HTML Editor based on HTML5.

Super simple WYSIWYG Editor. Summernote is a JavaScript library that helps you create WYSIWYG editors online. It saves images directly in the content of the field using base64 encoding, so you don't need to implement image handling at all. It also supports paste images from clipboard, Interactive WYSIWYG editing, Handy integration with server and lot more.

Summernote - Super simple WYSIWYG editor

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

A medium like rich text editor built upon draft-js with an emphasis on eliminating mouse usage by adding relevant keyboard shortcuts. Documentation in progress.

A medium like rich text editor built upon draft-js with an emphasis on eliminating mouse usage by adding relevant keyboard shortcuts. 

medium-draft - A medium like Rich Text Editor built on draft-js with a focus on keyboard shortcuts

Medium.com WYSIWYG editor clone. Uses contenteditable API to implement a rich text solution. MediumEditor has been written using vanilla JavaScript, no additional frameworks required.

Medium Editor - Medium.com WYSIWYG editor clone

DeckDeckGo aims to be the open source web editor for presentations. It enables anyone with any type of devices (desktop, mobile or tablets) to easily create, present and share presentations for free. Create quickly simple PWA presentations using rich Templates. Interact with a remote control and live polls for your audience. You can present and work offline. YouTube videos can be easily integrated.

DeckDeckGo  - The web open source editor for presentations

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

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