CKEditor - Real-time collaborative future-ready rich text editor
Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
BBEdit - BBEdit is a professional HTML and text editor for Macintosh that provides features for editing, searching, and minipulation of text for web authors and software developers.
Quill - Powerful, API-driven rich text editor
Atom - At GitHub, we’re building the text editor we’ve always wanted: hackable to the core, but approachable on the first day without ever touching a config file. We can’t wait to see what you build with it.