Skype has its issues, but it’s still the easiest way to quickly have a voice or video call from your computer.

GoToMeeting is similar to Zoom and covers everything that Zoom does – with one exception; you can join GoToMeeting without having to download software on to your computer,

Zoom is a video conferencing tool that I use for most of my online meetings; it’s got a stack of features and screen sharing is one of them.