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BalanceNG is a software Load Balancing Solution running on the hardware of your choice. BalanceNG is available for Linux/x86, Solaris 10 (x86 and SPARC) operating systems. Clean, logical and easy to apply command and configuration language. Free Basic License: A basic load balancer setup with one virtual server and two targets may be evaluated as long as needed at no charge.
TCPfork is a userland TCP proxy with advanced load balancing capabilities. Its core features are the ability to load balance on a "least connection" basis and the ability to take the machine load into account ("least load" or "least resource" load balancing). This is implemented by using the bngagent UDP protocol. It performs "TCP open" health checks by default and allows the use of external health check scripts. TCPfork 2.x introduces a highly optimized multithreading connection scheduler, allowing fast processing of very high numbers of concurrent connections.