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

Walkaround - Walkaround is a variant of Wave, based on the Apache Wave code base, that runs on App Engine.

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!

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

Rizzoma - Email and IM are linear contextless communication tools.