Core Tunnel - Core Tunnel is the best way to manage your SSH tunnels, with OS X Keychain integration.
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.
Doffen SSH Tunnel - May 28, 2015 New version https://sourceforge.net/p/doffensshtunnel
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface