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.
EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.