OWASP Coraza WAF is a golang modsecurity compatible firewall library
An engine to make Tor network your default gateway
Proxy Cache and Web filtering Appliance
Linux firewall distribution geared towards home and SOHO users.
IOSec Addons are enhancements for web security and crawler detection
OpenBSD IPsec based VPN
Lomalarga is a VPN-like service based on SSH and Linux.