Web backends. I've used Flask, Django, Sinatra, and static site generators. Flask and Sinatra are great for simple APIs, anything more and you'll wish you had t

Web backends. I've used Flask, Django, Sinatra, and static site generators. Flask and Sinatra are great for simple APIs, anything more and you'll wish you had the structure of a larger framework. Django for database backed frontends. Static site generators for simple sites that have no need for persistence. Static sites can actually go further than you would expect at first glance, for instance, Obama's campaign website was backed by static HTML.