Skype is a internet based messaging service, best know for its free video calling service. It is still widely used but more popular applications are now also providing the same services as Skype meaning it isn’t attracting as many new users as the other services. One advantage it has is that it has a PC version of its application, so you can use it on your PC as well as your phone.

Skype was originally created in Estonia, was bought by Ebay in 2009, but is now owned by Microsoft since 2011 and still based in Estonia.