RichEditor for Android is a beautiful Rich Text WYSIWYG Editor for Android.
Press is a wysiwyg writer for crafting notes inspired by Bear. It uses markdown for styling and formatting text with a beautiful inline preview.
An iframe free text editor that uses native components in the content tree. Motivation was to create a clean native feel WYSIWYG editor like medium.com has.
Aztec (which extends EditText) is a rich-text editor component for writing HTML documents in Android.