Fugu is a graphical frontend to the commandline Secure File Transfer application (SFTP). SFTP is similar to FTP, but unlike FTP, the entire session is encrypted, meaning no passwords are sent in cleartext form, and is thus much less vulnerable to third-party interception. Fugu allows you to take advantage of SFTP's security without having to sacrifice the ease of use found in a GUI. Fugu also includes support for SCP file transfers, and the ability to create secure tunnels via SSH.
FrameSeer is a Cocoa application which lets you capture and decode data-communications traffic as it passes across your network. FrameSeer uses the services of a standard Unix utility called tcpdump, which is installed by the Mac OS X installer as part of the BSD subsystem. FrameSeer provides a graphical user interface to the facilities offered by tcpdump. FrameSeer can capture traffic on your Ethernet, AirPort, PPPoE (eg aDSL or cable-modem), PPP (eg dial-up modem) and loopback interfaces.
As an alternative to Web Confidential, a freeware application to store sensitive data is Pastor. This is a tool to store all your passwords, website logins, program serial numbers, etc. RC4-encrypted and password-protected with a built-in password generator.
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