Open Source Monitoring System for performance and availability.
Nagios network monitoring software is enterprise server monitoring
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Next Generation Open Source Firewall
Firewall log analyzer
Anti Spam SMTP Gateway
Enterprise-class, distributed monitoring solution for networks & apps
Xplico is a Network Forensic Analysis Tool (NFAT)
Linux Server and Data-Center WAN Optimization
Open Source SIEM
Energy and environmental monitoring of the server room
BGPHist stores MP-BGP updates activity and history into a database.
Weblooker monitors serveral services on multiple systems for their sta