Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Dovecot - Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with...
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.
Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.
Courier IMAP - The Courier IMAP server is a fast, scalable, enterprise IMAP server that uses Maildirs.