TOVNatron is an open-source node-based compositing application used to create visual effects and motion graphics. It is impressive how the text node has plenty of properties that the user can change to control how the text appears on the screen.
Ole-André Rodlie@textovervideo I recommend you check out the 'markup' option in the Text node. Then you can use the Pango markup language (simplified HTML) to style (colors, sizes, fonts) sections of the text using <span>. And more... I tried to include as many options as possible 😃 Sadly I stopped working on the Text node several years ago.
Anyway, Natron needs developers! The project is dying.
https://natron.readthedocs.io/en/v2.3.15/plugins/net.fxarena.openfx.Text.html