ip man

Monitors networked computers and TCP/IP services running on them continuously.

Minimal python dns server, it only replies with a selected ip in an A record

NAT, IP-filtering, firewall, routing, port mapping, QoS, bandwidth, URL blocking

AuthentiX ISP allows delegation of administration rights per-IP-Address.

Object for simple IP adress and host name resolution, ASP and VB TraceRoute/ping

ipcalc takes an IP address and netmask and calculates the resulting broadcast

hping is a command-line oriented TCP/IP packet assembler/analyzer

Monitor your Internet and network connections. With IP-Lookup tools & more.

NETSCAN PRO 3.3 is the real advanced TCP/IP monitoring utility

connect to machines that you setup using an IP address and port number