Rails is a model–view–controller framework, that provides default structures for a database, a web service, and web pages.
Flask is a micro-web framework written in Python. It is classified as a microframework because it does not require particular tools or libraries.
Django is a Python-based free and open-source web framework that follows the model–view–controller architectural pattern. It is maintained by the Django Software Foundation, an independent organization established in the US as a non-profit.
Laravel is a free, open-source PHP web framework, created by Taylor Otwell and intended for the development of web applications following the model–view–controller architectural pattern and based on Symfony.
Express.js, or simply Express, is a back-end web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.