NextPlane - NextPlane offers cloud-based, scalable unified communications federation service for the enterprise.

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.

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.

Sameroom - Chat interoperability-as-a-service

RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.