Proxifier - Proxifier extends the advantages of a proxy server to network applications that don't natively support it.
Fiddler - Fiddler is a debugging program for websites.
Proxycap - ProxyCap empowers you to divert your PC’s system associations through intermediary servers.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Proxychains - About proxychains tool: * It's a proxifier. * Latest version: 3.1
HTTP Toolkit - Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.