Samepage is an award-winning real-time intranet software built to help teams co-author documents, share files, manage tasks & calendars, draw diagrams, edit spreadsheets, & more. Secure sharing helps you collaborate with co-workers, contractors, clients, etc. Built-in group chat & video calling lets you see your team and its conversations alongside the content you're working on together. It also integrates with hundreds of apps to help you consolidate workflows & avoid email overload.
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.
Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.