Frameworks

Python

Requests:
   Documentation: https://docs.python-requests.org/en/master/
   GitHub: https://github.com/psf/requests
   PyPi: https://pypi.org/project/requests/

Tavern:
   Homepage: https://taverntesting.github.io/
   Documentation: https://tavern.readthedocs.io/en/latest/
   GitHub: https://github.com/taverntesting/tavern
   PyPi: https://pypi.org/project/tavern/

JavaScript

Postman:
   Homepage: https://www.postman.com/
   Documentation: https://learning.postman.com/docs/
   GitHub: https://github.com/postmanlabs

Supertest:
GitHub: https://github.com/visionmedia/supertest
npm: https://www.npmjs.com/package/supertest

Java

RestAssured:
   Homepage: https://rest-assured.io/
   Documentation: https://github.com/rest-assured/rest-assured/wiki/Usage
   GitHub: https://github.com/rest-assured/rest-assured

Karate:
Documentation: https://karatelabs.github.io/karate/
GitHub: https://github.com/karatelabs/karate

C#

RestSharp:
   Homepage: https://restsharp.dev/
   Documentation: https://restsharp.dev/getting-started/
   GitHub: https://github.com/restsharp/RestSharp

PHP

Codeception:
   Homepage: https://codeception.com/
   Documentation: https://codeception.com/docs/01-Introduction
   GitHub: https://github.com/codeception/codeception

Various

Pact:
   Homepage: https://pact.io/
   Documentation: https://docs.pact.io/
   GitHub: https://github.com/pact-foundation