Free & Open-Source NotePlan 3 Alternatives

Markdown note app with calendar.

1. Joplin ↗ FOSSPRIVATESELF-HOST
   Encrypted markdown notes with cloud sync.
   ●○○Easy · Imports via export file
2. Logseq ↗ FOSSPRIVATE
   Outliner-style note-taking with bidirectional links.
   ●●○Medium · Imports Markdown / plain text
3. Obsidian ↗ PRIVATE
   Markdown-based knowledge graph (free for personal use).
   ●○○Easy · Imports Markdown / plain text