Trumbowyg
Light, translatable and customizable jQuery plugin. Beautiful design, generates semantic code, comes with a powerful API. Editor and generated code are optimized for HTML5 support. Compatible with all recents browsers like IE9+, Chrome, Opera and Firefox. All existing WYSIWYG editors are larger than 45kB. Trumbowyg is only 20kB which means faster page loading. No useless features, just the necessary ones to generate clean, semantic code. Options and design are entirely configurable to suit your needs. However, the default design is compatible with Retina display and optimized for a great and simple user experience. You can create your own plugins for Trumbowyg and propose them via pull requests on the Github repository. You can create your own package for Trumbowyg or use a ready for use. This is the full list of known packages for Trumbowyg. Trumbowyg is an MIT-licensed open source project and completely free to use.
Learn more
Squire
Squire is an HTML5 rich text editor, which provides powerful cross-browser normalisation, whilst being supremely lightweight and flexible. It is built for the present and the future, and as such does not support truly ancient browsers. It should work fine back to around Opera 10, Firefox 3.5, Safari 4, Chrome 9 and IE8. Unlike other HTML5 rich text editors, Squire was written as a component for writing documents (emails, essays, etc.), not doing wysiwyg websites. If you are looking for support for inserting form controls or flash components or the like, you'll need to look elsewhere. However for many purposes, Squire may be just what you need, providing the power without the bloat.
Learn more
TOAST UI
JavaScript UI library and free open source project constantly managed by NHN. Chart makes your data pop. Its numerous charts like Line, Bar, Pie, and more are easy to use, and you can export your data to excel or even as images. Editor allows you to interact with their Markdown documents through both text and WYSIWYG. With syntax highlighting, scroll-sync, live preview, charts, and much more diverse features and UI, it takes your word processing to the next level. Grid is a powerful grid library with data editing, filtering, sorting, pagination features, and more. Furthermore, you can customize the editor and the renderer to your desired format and visualize your data however you like. Calendar provides monthly, weekly, multi-weekly, daily views, and more, as well as a basic pop-up UI you can use to add/edit/delete your schedules. You can manage your schedule simply by dragging the schedules around. Managing your calendar has never been easier.
Learn more
woofmark
A modular, progressive, and beautiful Markdown and HTML editor. Markdown lets you produce rich HTML-formatted text by writing plain text. You can write code, text in italics or give them a “bolder” format. You can create headings by prefixing them with one or more hash characters (#). The less hashes they have, the more prominent your headings become. Creating links is merely a matter of wrapping some text in brackets and referencing a resource locator, like the ones you’ll find at the bottom of this text. Images can be embedded just the same, except you’ll have to prefix the wrapped text with an exclamation mark. The buttons provided look kind of rough, but that's on purpose, it's up to you to style them and the API helps you do that. Small and focused, progressive, enhance a raw textarea. Markdown, HTML, and WYSIWYG input modes. Text selection persists even across input modes! Built in undo and redo. Entirely customizable styles.
Learn more