Scapy is a Python-based interactive packet manipulation program
High performance ping tool
Python library and shell utilities to monitor filesystem events
High capacity syslog data collection, filtering, and management.
repair corrupted pcap and pcapng files
Package xdp allows one to use XDP sockets
tcptrace analyzes packet tcp connections and provides analysis
An open-source and enterprise-level monitoring system
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
Creates web pages that show information about Ethernet switches.
Acquires external IP address from command line
RanMon is a program that provides you with a way to internet monitor
...has moved to packetpeeper.org
HTTProvjera is a program that provides you with a way to web monitor
Daemonlogger is a packet logger and soft tap developed by Martin Roes
Passive Proxy Daemon sniffs packets and creates squid proxy logs
Wait for a network device to come online and run an associated script