RedNotebook
Desktop journal with calendar navigation, tags, and templates—stores files locally.
Why it is included
GPL-3.0 diary app often listed in “offline journal” roundups.
Best for
Daily logs and personal journaling without a cloud account.
If you use Windows, Mac, or paid tools
Journal alternative to Day One (paid), Journey, and macOS Diary apps for offline dated entries.
Strengths
- Simple calendar UX
- Markdown-ish formatting
- Local files
Limitations
- Not a team wiki
Good alternatives
Joplin · Logseq
Related tools
Notes & Knowledge
Joplin
Markdown-centric notes with optional E2EE sync and broad cross-platform clients.
Notes & Knowledge
Trilium Notes
Hierarchical note app with rich text, scripting, and optional self-hosted sync server.
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memos
Lightweight memo hub with tagging and sharing.
Notes & Knowledge
Freeplane
Mind-mapping and knowledge organization tool evolved from FreeMind with scripting and filters.
Notes & Knowledge
Xournal++
Handwriting note-taking and PDF annotation with pressure-sensitive stylus support.
Notes & Knowledge
Logseq
Outliner + graph PKM with block references and plugin ecosystem.