1. A professional visual editor for Bootstrap 4 and 3, Foundation, responsive design, HTML, and CSS. Convert HTML to WordPress themes.

  2. TinyMCE is a content editor that functions as a plug-in for Wordpress websites.

  3. Opera Dragonfly is a cross device, cross platform debugging environment for the Opera browser-debug JavaScript, inspect and edit CSS and the DOM, and view any errors on your mobile or computer.

  4. A modern, open source text editor that understands web design

  5. Google Web Designer is a free, professional-grade HTML5 authoring tool. Build interactive, animated HTML5 creative, no coding necessary.

  6. Lightweight IDE for Linux and Windows