This product is no longer maintained:
The author created alternative tools: https://databunker.org/ and https://privacybunker.io/
GreenSQL is a database firewall engine used to protect Open Source Databases from SQL injection attacks. It works in proxy mode. Application logic is based on evaluating of SQL commands using risk score factors, as well as blocking of sensitive commands
Antispyd is an HTTP/HTTPS threats filtering proxy server written in pure C under Linux. The main goal of the project is to develop a free, secure, fast and extensible solution to fight against current Web threats, anonymize and control web traffic.