Tkined/Scotty
Tkined/Scotty is a graphical network monitoring package
... Name System (DNS)
* access UDP sockets
* probe and use some selected SUN RPCs
* send and receive SNMP messages (SNMPv1, SNMPv2C, SNMPv3)
* write special purpose SNMP agents in Tcl
* parse and access SNMP MIB definitions
* schedule jobs that are to be done regularly
* realize event driven programming on network maps