7-Zip File De/Compression Utility
7-Zip is an excellent open-source compression/decompression tool that supports many archive formats.
Mozilla Firefox Web Browser
Open-source web browser from the Mozilla team. Take back control of your web browsing!
Mozilla Thunderbird e-Mail Client
Open-source E-mail client from the same people who make Mozilla Firefox. Take back control of your e-Mail!
PuTTY Telnet/SSH Client
A freeware Telnet/SSH client with supplemental software. These tools are a must-have for Linux server admins.
FileZilla FTP Software
Open-source FTP Client and Server software. These are arguably some of the best FTP solutions available.
Ultra VNC Remote Control Software
Remote control software available under the GPL license.