Pinegrow - A professional visual editor for Bootstrap 4 and 3, Foundation, responsive design, HTML, and CSS. Convert HTML to WordPress themes.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
BlueGriffon - An HTML editor based on Mozilla rendering engine.
Synfig Studio - Just another WordPress site
Webflow - Build dynamic, responsive websites in your browser. Launch with a click. Or export your squeaky-clean code to host wherever you'd like. Discover the professional website builder made for designers.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.