HTTP/REST Clients

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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)

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