Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.
Slack - A messaging app for teams who see through the Earth!
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Mattermost - Mattermost is an open source alternative to Slack.
Creativity 365 - Cross-device content creation suite
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.