Office Productivity

Microsoft 365

Google Workspace

Other

Google Docs

LibreOffice

Zoho Writer

Slides

Powerpoint

Google Slides

LibreOffice

Chat

Teams is a "chat-based team collaboration hub"

Video Calls

Zoom

Video

Stream

Youtube

Social

Microsoft Yammer is an enterprise social networking platform. 

Google Chat Spaces

Content Management

SharePoint is a content management and collaboration platform.

Desktop Publishing

Microsoft Publisher

Adobe InDesign

Apple Pages

Diagrams

Visio

Google Drawings

diagrams.net / draw.io

Search

Bing

DuckDuckGo

File Sharing

OneDrive

Google Drive

Photos

Google Photos

Forms

Google Forms

Chat

Enterprise Social Networking

Video Conferencing

Content Management

Bibliography

Abiword