Formiko is a reStructuredText and Markdown editor and live previewer.
It is written in Python with GTK4, libadwaita, GtkSourceView and WebKit. Uses
Docutils and m2r2 Markdown parser.

Features:

• GtkSourceView based editor with syntax highlighting
• Optional Vim editor support
• Vertical or horizontal window splitting
• Preview mode with auto scroll
• Periodic file save
• JSON and HTML preview
• Spell check
• Linked file opening