Well there is the Cisco PIX firewall Management center (CiscoWorks) but that is not freeware. I have a cool little utility provided free from KIWI called cattools2. It will allow you to push configs to many cisco devices automatically or download configs automatically. Say if you want to push the command "no ip http server" to all your Cisco devices, you just plug in the command and push it out. It will store all the devices you want in it etc. Only catch is to use it with firewall, you must be on the inside because it is Telnet only, no ipsec. Here is a link if you want to try it out.
http://www.softpile.com/Utilities/Network/Download_13207_3.html
