Notion

Notion is a versatile all-in-one workspace app designed for individuals and teams to organize, collaborate, and manage projects, notes, and knowledge in one place.

It's now powered by AI features and integrates with popular tools like Slack, Google Drive, and GitHub. Available on macOS, Windows, iOS, Android, and the web, Notion is for everyone, whether you need a to-do list, content calendar, personal CRM, or company wiki. It's no wonder that some people refer to Notion as their second brain.