OWASP Coraza WAF is a golang modsecurity compatible firewall library
Manage port forwardings via UPnP
A java PCAP and DPI library
SSH Java client GUI for Unix, Linux administration and monitoring
Sonicwall Configuration File Reader
ISeeWhatYouAreDoing - a tool for remote acces with very! low bandwith.
Lomalarga is a VPN-like service based on SSH and Linux.