BlueGriffon is a new-gen WYSIWYG cross-platform editor based on Gecko, the rendering engine of Firefox. It is conformant to the latest W3C Standards including HTML 5, CSS 2.1 and large parts of CSS 3, CSS Mdia Queries, MathML, SVG and more. BlueGriffon is open source released under the Mozilla Public License. This version is a 64-bit build.
Note: Now requires a 64-bit Intel processor.