Geany - Lightweight IDE for Linux and Windows
CKEditor - Real-time collaborative future-ready rich text editor
BlueGriffon - An HTML editor based on Mozilla rendering engine.
Edtr.io - Intuitive WYSIWYG web editor, open source & fully adaptable.
Adobe Dreamweaver - Adobe Dreamweaver is a proprietary web development tool developed by Adobe Systems.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.