Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
jEnTunnel - Manage SSH Tunnels made easy
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.
Core Tunnel - Core Tunnel is the best way to manage your SSH tunnels, with OS X Keychain integration.
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
MyEnTunnel - Basically, MyEnTunnel is an efficient method for maintaining the tunnels of TCP SSH, MyEnTunnel has many advantages upon its usage. Plink (PuTTY Link)...