1. A free HTTP based JSON Storage.

  2. Restlet provides an API PaaS for API design, API testing, API management and hosting.

  3. Gravitee.io is a flexible, lightweight and an open source API management solution.

    freemium

  4. Build, deploy and share APIs & microservices easily ๐Ÿš€

  5. A hosted REST-API ready to respond to your AJAX requests.

  6. Fresh API monitoring and Site Transaction Monitoring. From one great dashboard.

  7. API Analytics for Platform Teams

  8. Tools to measure and improve developer adoption of your API.

  9. Referral Automation, Made Simple.

  10. Assertible software provides you with a simple and quick way to monitor your web services. It comes with automated QA tools that users can utilize to test and monitor their web services on different platforms and environments.

  11. Alamofire is an HTTP networking library written in Swift.

  12. Fiddler is a debugging program for websites.