Skype: Oldie but a goodie. Free calls and messenger service.
Go-To-Meeting: Video conferencing and webinar tools.
Join.me: Free screen sharing, online meetings and team collaboration at your fingertips.
Zoom: A cloud-based video and audio conferencing platform.
Drift: Drift is a conversation-driven marketing and sales platform.
Uber Conference: If you run an online business, you’re going to need to set up virtual meetings with your clients and this tool allows you to do that anytime.