Similar to Proxomitron

Metasploit

Midnight Commander

MsQuic

Netatalk

Netcat

Netstat

NetworkManager

Nghttp2

NPF (firewall)

Ns (simulator)

Open Transport

OpenMosix

OpenWrt

OTRS

Pandora FMS

PF (firewall)

Ping (networking utility)

Point-to-Point Protocol daemon

Rdesktop

Requests (software)

Route (command)

Rsync

Squid (software)

TCP Wrappers

Tcpdump

Telepathy (software)

Traceroute

TUN/TAP