Google Open Source - All of Googles open source projects under a single umbrella
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
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.
Open Source @IFTTT - A collection of IFTTT OSS projects.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.