HTTP/REST Clients

Advanced REST Client (electron)

Ling (electron)

https://github.com/postmanlabs/postman-chrome-extension-legacy

https://github.com/chao/RESTClient

Insomnia REST Client

Postman

https://github.com/paulhitz/yet-another-rest-client

http://www.servistate.com/

https://restlet.com/modules/client/ (DHC Rest Client)

Only MAC OS

https://mmattozzi.github.io/cocoa-rest-client/