Similar to FileZilla

Tcpdump

Telepathy (software)

Traceroute

TUN/TAP

Twisted (software)

UIP (software)

Unison (software)

Varnish (software)

Vyatta

VyOS

Wpa supplicant

XChat

Xrdp

Ifconfig

Kontact#News Feed Aggregator

Applet

Instant messaging#Review of products

Internet bot

Web application

Web framework

Web browser

QualNet

Web crawler