Dr. Link Check - Broken link checker with malware and parked domain detection
HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
Check a Site - Scan websites for over 700 quality problems
MockServer - Easy mocking of any system you integrate with via HTTP or HTTPS.
Karate - Web-services testing made simple 🥋
Request inspector - Debug web hooks, http clients