Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

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.

tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page

RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.