ModSecurity: Open Source Web Application Firewall. Varnish makes websites fly! Gmbh. The Pound program is a reverse proxy, load balancer and HTTPS front-end for Web server(s).
Pound was developed to enable distributing the load among several Web-servers and to allow for a convenient SSL wrapper for those Web servers that do not offer it natively. Pound is distributed under the GPL - no warranty, it's free to use, copy and give away. Welcome to The Apache Software Foundation!