I would say Django (framework) and Flask (microframework) are the biggest. But lots of people build many mainly due to the WSGI support that makes it easy. At

I would say Django (framework) and Flask (microframework) are the biggest. But lots of people build many mainly due to the WSGI support that makes it easy. At first, I actually thought this post was about a PHP microframework called Flight: https://github.com/mikecao/flight https://github.com/mikecao/flight