A Ruby port and v2 of Site Inspector (http://github.com/benbalter/site-inspector)
site = SiteInspector.new "whitehouse.gov"
site.https?
# => false
site.non_www?
# => true
site.cms
# => { :drupal => {}}comming soon
There's a lightweight demo server included. Just run script/server and open localhost:9292 in your browser.