Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Handheld Designer - Easily create and host beautiful HTML5 mobile web applications for the iPhone, iPad, and iPod touch.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Maqetta - Maqetta is an open source project that provides WYSIWYG visual authoring of HTML5 user interfaces.
Embitz - Embitz is a free C/C++ IDE built to meet the most demanding needs of its users working in the field...
Pinegrow - A professional visual editor for Bootstrap 4 and 3, Foundation, responsive design, HTML, and CSS. Convert HTML to WordPress themes.