Add HttpMaster (#62)

README.md

@@ -61,6 +61,7 @@ Finally, I'm sure everyone who reads this list has one thing they want to add. P
 - [RestQA](https://github.com/restqa/restqa) - A REST API testing Framework based on ghekin to manage microservice local testing using the best in class Developer experience.
 - [playwright-bdd](https://github.com/vitalets/playwright-bdd) - A module for running Behaviour-Driven Development (BDD) tests with Playwright runner.
 - [Zato API Test](https://zato.io/en/docs/3.2/api-testing/index.html) - API testing in pure English. No programming needed. Implemented and extendable in Python.
+- [HttpMaster](https://www.httpmaster.net) - Professional software tool for HTTP testing and debugging.
 
 ### Web3 and Blockchain
 - [Dapp.tools](https://dapp.tools/) - Command line tools and smart contract libraries for Ethereum smart contract development.