Vidalia is a cross-platform controller GUI for the Tor software, built using the Qt framework. Vidalia runs on most platforms supported by Qt 4.2 or later, including Windows, Mac OS X, and Linux or other Unix variants using the X11 window system.

PuTTY is an SSH and telnet client, developed originally by Simon Tatham for the Windows platform. PuTTY is open source software that is available with source code and is developed and supported by a group of volunteers.

Welcome to the homepage of FileZilla, the free FTP solution. Both a client and a server are available. FileZilla is open source software distributed free of charge under the terms of the GNU General Public License

7-Zip is a file archiver with a high compression ratio.