My obsession with network related programs and protocols has created these:
epb - Ethernet Packet generator (and more)
nsn - Network status monitoring tool for linux
thongs-sniffer - network sniffing and traffic analyzing tool + ethernet packet crafter for linux (derived from nibbles)
nibbles - UDP print listener + something else
http :// xp-dev.com/svn/MazPong - MazPong - revived??
http :// xp-dev.com/svn/Mazzie-mazbot/ - MazBotV4