Open Source Monitoring System for performance and availability.
Sysmon prints short and uniform information about OS
A network security analysis and monitoring toolkit Linux distribution.
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Anti Spam SMTP Gateway
Xymon monitors your hosts, your network services, and everything else.
The Free & Popular opendhcp application for Physical & Virtual Machine
Wide Area Network Emulator
Pioneering Private and Public Cloud Management since 2008
A powerful network security tool, easy, safe and totally free.
OPTOSS Next Gen Network Management System (NG-NetMS)
High interaction honeypot solution for Linux based systems
[UPDATE 28-10-2015] FINAL MULTIPLINK SSH LIFETIME v2.0 UP-5 "FAREWELL"
SSH Java client GUI for Unix, Linux administration and monitoring
network control and reporting
Generates a Unique Local IPv6 Global ID Address (Linux Only)
Centreon Hypervisor for multiple Nagios Poller via FTP
ss7mon an SS7/SIGTRAN signalling monitor