Software Load Balancer

Any one have any other suggestions.
I am looking a free software load balancer options.

Got a few..

1) Sun Web Server 7.0 includes a Reverse Proxy Plugin(RPP) that can be used as a simple software load balancer . Sun Application Server also has a Load balancer plugin that can also be used. For reference, the docs:

AS : http://docs.sun.com/app/docs/doc/820-4341/gchvt?l=en&a=view

WS: http://docs.sun.com/app/docs/doc/820-6600/ghquv?l=en&a=view&q=reverse+proxy


2)
http://www.sunfreeware.com/programlistsparc10.html#pen
http://www.blastwave.org/packages.php/pen
http://siag.nu/pen/

Allows round robin/response based, and failover to a landing page if all services are unavailable (useful for maintenance).
3) http://www.inlab.de/balance.html