Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Creativity 365 - Cross-device content creation suite
MailScanner - MailScanner is a open source email security system design for Linux-based email gateways.
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.
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...