Postman - The Collaboration Platform for API Development
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing
Microsoft Power Automate - Microsoft Power Automate is an automation platform that integrates DPA, RPA, and process mining. It lets you automate your organization at scale using low-code and AI.
Django REST framework - Django REST framework is a toolkit for building web APIs.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.