Formiko is reStructuredText and MarkDown editor and live previewer.
It is written in Python with Gtk3, GtkSourceView and Webkit2. Use
Docutils and recommonmark Common Mark parser.

Features:

• GtkSourceView based editor with syntax highlighting
• Possible use Vim editor
• Vertical or horizontal window splitting
• Preview mode with auto scroll
• Periodic save file
• Json and html preview
• Spell check
• Linked file opening