HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
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.
Skarpline - Skarpline provides centralized enterprise messaging, link sharing and file management to improve productivity.
Creativity 365 - Cross-device content creation suite