Adobe Contribute has been discontinued. Similar apps include CKEditor, which is open source and free for personal use. Other options are Quill, Aloha Editor, Flux and WebsiteBaker. You can choose from more than 10 Text Editors like Adobe Contribute for self-hosting, the web, Mac, Windows and Linux.
CKEditor 4 and CKEditor 5 are easy-to-implement open source JavaScript WYSIWYG rich text editors for any web browser. CKEditor Ecosystem has 2 very distinct rich text editors as well as image upload and collaboration solutions.
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Quill is a free, open source WYSIWYG editor built for the modern web. With its modular architecture and expressive API, it is completely customizable to fulfill any need.
Aloha Editor is an HTML5 WYSIWYG Editor that gives you a total new experience when editing. It's faster than existing WYSIWYG technologies and offers unprecedented WYSIWYG functionalities.
Flux is an advanced HTML5 Web design application, capable of creating stunning sites from scratch. Flux isn't a template based solution, it's a creative design environment.
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WebsiteBaker helps you to create the website you want: A free, easy, secure, flexible and extensible Open Source Content Management System.
Maqetta is an open source project that provides WYSIWYG visual authoring of HTML5 user interfaces. The Maqetta application itself is authored in HTML, and therefore runs in the browser without requiring additional plugins or downloads.
United States
OpenBEXI is a WYSIWYG HTML builder using the magic of HTML5 and CSS3 . By resizing, dragging and dropping various HTML widgets it is easy to build a web page.
Compose beautifully formatted text in your web application. 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...
MediumEditor is a Medium.com WYSIWYG editor clone, a dead simple inline editor toolbar. Uses contenteditable API to implement a rich text solution.
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NicEdit is a free inline wysiwg html editor you can easily add to your site in seconds! NicEdit is a Lightweight, Cross Platform, Inline Content Editor to allow easy editing of web site content on the fly in the browser.
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WBCE is an open source PHP/MySQL CMS. It's a further development (fork) of WebsiteBaker with new features and is improved continously.
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