KompoZer might have discontinued, try finding KompoZer alternatives
KompoZer is an open source WYSIWYG HTML editor based on the now-discontinued Nvu editor. KompoZer is maintained as a community-driven fork, and is a project on Sourceforge.
Developed by Mozilla
Apps available for
Mac OS X
Design Website Visually
Design website using a visual editor.
Edit HTML And CSS
Edit HTML and CSS files.
KompoZer is an Open Source Product.
Mozilla has developed KompoZer