Open Source Monitoring System for performance and availability.
Euler Yet another proof Engine
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
A native HTML4 / HTML5 Remote Desktop Protocol client
Xplico is a Network Forensic Analysis Tool (NFAT)
[UPDATE 28-10-2015] FINAL MULTIPLINK SSH LIFETIME v2.0 UP-5 "FAREWELL"
Collects data about network useage using libpcap.
Logs IP to IP contact, number of packets, bytes.