REST-Assured - Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.
Airborne - RSpec driven API testing framework.
Rest Console - HTTP Client and Request Visualizer and Constructor tool, helps developers build, debug and test RESTful APIs
JMeter - Official Twitter account of JMeter, the open source load testing tool by @TheAsf. Code: https://t.co/ADK2A8Pl14. Website: https://t.co/oc0MW2ksea
Tricentis - Tricentis Tosca is an effective end-to-end testing suite for enterprises, providing functional software testing tools.
Postman - The Collaboration Platform for API Development