Ronseal!
Just spent a happy half hour on these.
http://chuckgame.blogspot.com/2010/09/renaissance-wargaming.html
http://www.fortunecity.com/marina/salmon/224/Renaissancehome.html
http://www.renaissancewargamesociety.com/renwargaming.shtml
http://www.pikeandshotsociety.org/links.htm#wargame
http://wargaming.info/index.php?option=com_weblinks&view=category&id=25
Enjoy!