Joplin
An open-source notes app with Markdown, attachments, tags, end-to-end encryption, web clipping, and several sync backends.
Why use it
Solo developers and producers can build searchable archives of meetings, research, and decisions while retaining local copies.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
Live collaboration depends on cloud plans and is less fluid than online documents, while sync conflicts, storage, and encryption recovery need policy.