EtherCalc - EtherCalc is a web spreadsheet.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
SSuite Axcel Professional Spreadsheet - This powerful and professional spreadsheet has all the tools you need to calculate, analyse, summarize, and present your data in numerical reports or colourful graphics.
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.
Keikai - Effortlessly Build Spreadsheet-driven Web Apps
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.