RESTed is described as 'allows developers to quickly format and make HTTP requests and view the response' and is an app in the Development category. There are more than 25 alternatives to RESTed for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and Google Chrome. The best alternative is Insomnia REST Client, which is both free and Open Source. Other great apps like RESTed are Postman (Freemium), Fiddler (Freemium), Google Chrome Developer Tools (Free, Open Source) and Paw (Paid).
Postman is a tool that facilitates the development and use of APIs. Postman provides all the functionality needed to create or simulate API specifications and use the Postman Collection Runner to create tests.
Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data.
Easily craft your HTTP requests, try them, archive them. Setup HTTP Headers, URL parameters, form-encoded POST key-values or text. Get easy-to-read responses with well formatted headers and body. Sync your projects with your team through Paw for Teams.
NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows. NetworkMiner can parse PCAP files and regenerate/reassemble transmitted files and certificates from PCAP files with HTTP, FTP, SMB, SMB2, TFTP and several other protocols.