Fail2ban - Intrusion prevention framework
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
RdpGuard - RdpGuard allows you to protect your Remote Desktop (RDP), POP3, FTP, SMTP, IMAP, MSSQL, MySQL, VoIP/SIP from brute-force attacks by blocking attacker's IP address. Fail2Ban for Windows.
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
SSHGuard - SSHGuard monitors services through their logging activity.
HTTP Headers - HTTP Headers allows you to quickly see the HTTP header information for the current URL.