ExpressJS, Flask, Django REST framework, FastAPI, and Sinatra are the most popular tools in the category “Microframeworks”. “Simple” is the primary reason developers pick ExpressJS over its competitors, while “For it flexibility” is the reason why Flask was chosen.
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
A microframework for Python based on Werkzeug, Jinja 2 and good intentions
Develop, manage and scale REST APIs with Node.js
A high performance, easy to learn, fast to code, ready for production web framework
An open-source, lightweight and fast server-side .NET web-framework
High performance, extensible, minimalist Go web framework
Framework for quickly creating connected applications in Kotlin
Creating delicious APIs for Django apps since 2010.