Manage your VMware ESX server remotely via the Service Console over SSH. I have written bash scripts with a nice GUI named dialog, and uses the VMware ESXCFG server Commands. The language standard will be englisch , but here and there you will find some
Web based frontend for the *NIX IPTables. Allows you to manage your iptables, add/delete ports, ban/unban ip's etc. Extremely handy for your *NIX router!