We are trying to revive and modernise a once popular editor xing/wysihtml5. It is an open source project and we will keep it this way. Keeping a wysiwyg working needs constant attention and care as browser inconsistencies tend to change with every new version. All pull requests, issues and tests pointing to issues are most welcome at https://github.com/Voog/wysihtml.
Unlike most of the other wysiwyg html editors — Wysihtml makes use of contenteditable so it works inline, on-site and doesn't need a separate window or iframe. It also works on nearly all browsers and platforms, including touch.
Voog team.