Similar to Rsync

Su (Unix)

Sudo

Syslog

Syslog-ng

Tail (Unix)

Talk (software)

Tar (computing)

Time (Unix)

Tomboy (software)

Top (software)

Tr (Unix)

Tty (Unix)

Tuxedo (software)

Uconv

Uname

Uniq

Upstart (software)

Uptime

Uuencoding

Vi (text editor)

W (Unix)

Wait (command)

Wall (Unix)

Wc (Unix)

Webmin

Whoami

Write (Unix)

WU-FTPD