MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.

OWASP ModSecurity Core Rule Set (CRS) Project (Official Repository)

ModSecurity v3 Nginx Connector

High-performance WAF built on the OpenResty stack

Bucardo multimaster and master/slave Postgres replication

Data-driven test scaffold for Nginx C module and OpenResty Lua library development