GoToWebinar - Webinar & Online Conference | GoToWebinar
Chatib - Chatib is an online chat room where you can meet and chat with new people, make them friends, or even data them online.
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.
ChatSecure - ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing
Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.