HAProxy

HAProxy powers the uptime of organizations with large infrastructures and enormous traffic demands by giving them the flexibility and confidence to deliver websites and applications with high availability, performance, and security at any scale and in any environment. Open source reverse proxy and load balancing with highly advanced application delivery controller functionality is the core of who we are. It is embedded in our DNA. Load balance by a round-robin, least connections, URI, IP address, and several hashing methods.

Send requests to specific application clusters based on URL, domain name, file extension, client IP address, the health state of backends, number of active connections, SSL client certificate, and more.