Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel.
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.
FastAPI vs Flask opinions
In my opinion, FastAPI wins over Flask because it has major features that are incredibly useful such as the Swagger UI Generator, compatibility with async.
It is very quick and easy to bootstrap a performant API with adequate responses, error handling and I/O validation
Crow is a C++ microframework for running web services. It uses routing similar to Python's Flask which makes it easy to use. It is also extremely fast, beating multiple existing C++ frameworks as well as non C++ frameworks.This app doesn't have any features at the moment.
Sinatra is a free and open source software web application library and domain-specific language written in Ruby. It is an alternative to other Ruby web application frameworks such as Ruby on Rails, Merb, Nitro, Camping, and Rango. It is dependent on the Rack web server interface.
Bottle is a fast, simple and lightweight WSGI micro web-framework for Python. It is distributed as a single file module and has no dependencies other than the Python Standard Library.This app doesn't have any features at the moment.
The jam.py is an object-oriented, event-driven framework with hierarchical structure. All this, in combination with very tight DB/GUI coupling, is the base for the DRY (don't repeat yourself) principle that is underlying the framework.
ViUR – the Information System for the Google App Engine™ plattform – is a »sandbox« for designers and developers. With the help of ViUR you can easy build web applications running on Google's infrastructure.