vBulletin - Build a community website with the leading forum software, vBulletin 5 Connect, or in the cloud on vB Cloud!
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.
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
XenForo - Intuitive. Social. Engaging. Fast. XenForo brings a fresh outlook to forum software.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.