TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows 7/Vista/XP, Mac OS X and Linux. Linphone, open-source voip software | Linphone, an open-source video sip phone. VPN - Spotflux (FREE) Tor PRIVATE Browser. IMPORTANT - EFF | TOR + HTTPS. Click the "Tor" button to see what data is visible to eavesdroppers when you're using Tor. The button will turn green to indicate that Tor is on.Click the "HTTPS" button to see what data is visible to eavesdroppers when you're using HTTPS. The button will turn green to indicate that HTTPS is on.When both buttons are green, you see the data that is visible to eavesdroppers when you are using both tools.When both buttons are grey, you see the data that is visible to eavesdroppers when you don't use either tool.Potentially visible data includes: the site you are visiting (SITE.COM), your username and password (USER/PW), the data you are transmitting (DATA), your IP address (LOCATION), and whether or not you are using Tor (TOR).