Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
Smart HTTPS - Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts...
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
SSL Enforcer - SSL Enforcer - Force SSL/TLS encryption for any browser or app. Block all unsecure connections.
HTTP Headers - HTTP Headers allows you to quickly see the HTTP header information for the current URL.
HTTPZ - HTTPZ is meant to be unobtrusive and lightweight.