Ok Skype, bought by Microsoft, works well enough. But, that ringtone, it is the most annoying sound in the world (even more than the scene in Dumb and Dumber). But can you change it? Noooooo, not that ...
Did you know you can mute and unmute someone on Skype during a group call or even remove some attendees? For example, if someone misbehaves, or you want to spare other colleagues from background noise ...