Burp Proxy is an intercepting proxy server for security testing of web applications. It operates as a man-in-the-middle between your browser and the target application
GreenSQL is an Open Source database firewall used to protect databases from SQL injection attacks. GreenSQL works as a proxy and has built in support for MySQL db. GreenSQL is a database security solution that can prevent SQL injections.
This service tunnels HTTP requests and changes the MIME type of text/html resources to application/xml or application/xhtml+xml. This allows accurate testing with XHTML user agents such as Firefox, Opera or Amaya.