HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
The New Dropbox - Enterprise software portal for team collaboration
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.
Flow - Stop managing projects from your inbox.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.