See also http://amon.cx/ http://amon.cx/ free open source for one server one application or $24.95 for no limits - host on your own servers "Amon is language a

See also http://amon.cx/ http://amon.cx/ free open source for one server one application or $24.95 for no limits - host on your own servers "Amon is language and framework agnostic and it doesn’t care if you have a PHP, Ruby on Rails, Node.js or Django app. The only requirement is that the language you are using supports http requests and json."