HTTPPie
HTTPie—aitch-tee-tee-pie—is a command line HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, and more.
curl
Curl GET, POST, Parameters and JSON
Postman
Design APIs Directly in Postman Manage all of your organization's APIs in Postman, with the industry's most complete API development environment.
- Supported OS: Windows, macOS, Linux
- Free version available
Insomnia REST Client
Debug APIs like a human, not a robot
- Supported OS: Windows, OS X, Ubuntu
- Free version available