AppFlowy

appflowy.com

Open-source Notion alternative: notes, wikis, boards and projects, with your data under control.

Strengths

A simple, effective task manager.

Organize your projects on boards of cards (kanban).

Let people book a slot in your calendar.

Markdown note-taking with linked notes, like a second brain.

Infinite collaborative whiteboard for team brainstorming.

To-do lists and reminders synced across all your devices.