Various ways to call web service or wcf service

 Hi,
 
  Please let me know Various ways of calling or consuming a web service and
  WCF service at client side.
 
  one way I know is - by adding a web reference to a project,we get web  
  service and by adding a service reference to a project, we get wcf service.
 
  Is any other way to have web service or WCF service.
 
  I searched in google but I couldn't get the answer what I was expecting.