Powerful SVG-Editor for your browser
Lexical is an extensible text editor framework
A Markdown Editor for the 21st century
A WYSIWYG Markdown editor, improve reading and editing experience
Web template editing mode for emacs
iOS Text View (UIView) that Properly Displays LaTeX, HTML
Static site IDE is a Static Site Generators aka Static Site Editor
A Medium.com WYSIWYG editor clone. A simple inline editor toolbar
XML editor for handle multiple XML files with XPath
Simple Ajax XML Editor, with limited XSD support