APIs

Simple, flexible, community driven PHP 5.3+ framework

Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.

The PHP micro-framework based on the Symfony Components

Server-side web application framework written in Ruby

Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort

Django makes it easier to build better Web apps more quickly and with less code

FastAPI is a modern, fast, web framework for building APIs with Python 3.6+ based on standard Python type hints.

Flask is a microframework for Python based on Werkzeug, Jinja 2 and good intentions

Tornado is a Python web framework and asynchronous networking library

Falcon is a bare-metal Python web API framework for building very fast app backends and microservices.