GoToWebinar - Webinar & Online Conference | GoToWebinar

Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.

Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.

Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.

WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing

Twitch Messenger - Desktop and mobile app for Twitch users to communicate with friends and teammates across platforms.