Alexandrie

The open-source, offline-first Notion, Obsidian & Confluence alternative. Advanced Markdown, multi-tenant teams, OIDC/SSO, and local S3 backups. Deploy in one command. Maintained by Smaug6739 on GitHub, where it has earned 1,888 stars from the community.

It's actively developed around docker, golang, kanban, and is a solid reference for anyone building with these tools.