OWASP Coraza WAF is a golang modsecurity compatible firewall library
Nagios Open Source network monitoring software - The Standard In ITM
Open Source Monitoring System for performance and availability.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
MSN compatible messenger application
Two-factor authentication system
Networking framework for Java applications
Detect Flooder IPs, Reduce Attack Surface against HTTP Flood Attacks
something that writes code for you