Wikipedia
ContentTools is an open-source WYSIWYG editor for HTML content written in JavaScript/ CoffeeScript by Anthony Blackshaw of Getme Limited.
The ContentTools editor allows text content, images, embedded videos, tables and other page content to be edited, resized, or moved via drag and drop directly within the page. The ContentTools editor features a floating context-sensitive toolbar which can be repositioned by the user and which offers functionality and ease of use similar to a word processing application.
The ContentTools editor is written in JavaScript / CoffeeScript, therefore it can easily be integrated with any HTML document, customised, extended or integrated into a full web-based content management system.
The ContentTools editor has already been implemented into the content management systems of a number of websites built by Getme Limited, as well as used within the third party systems Yii and Page Builder Sandwich.