Depending on what "community-driven" means, I'd like to add Python, Blender, Jupyter, Django ... I'd say "thriving community-based open source projects" are ra

Depending on what "community-driven" means, I'd like to add Python, Blender, Jupyter, Django ... I'd say "thriving community-based open source projects" are rare in the sense that most open source projects don't thrive (especially if you count every open-licensed repository on github), but there are tons of examples.