Awesome Personal Knowledge Management

Overview

Personal Knowledge Management (PKM) is the practice of capturing, organizing, and retrieving information to support learning, creativity, and productivity through structured note-taking and knowledge systems.

Features

Note-Taking Applications

Local-First and Privacy-Focused

• Obsidian: Markdown-based knowledge base

  • Bidirectional linking
  • Graph view visualization
  • Plugin ecosystem (1000+ plugins)
  • Local storage
  • Sync via iCloud/Dropbox or Obsidian Sync
  • Vim mode, canvas view
  • Mobile apps (iOS, Android)

• Logseq: Local-first outliner

  • Block-based editing
  • Daily notes
  • Graph visualization
  • Open source
  • PDF annotation
  • Flashcards and spaced repetition
  • Plugin system

• Foam: VSCode-based PKM

  • Markdown files
  • Git-friendly
  • Open source
  • Graph visualization
  • Templates and snippets

• Zettlr: Academic writing tool

  • Markdown editor
  • Citation management
  • Zettelkasten method
  • Export to multiple formats
  • Dark mode and theming

Cloud-Based Solutions

• Notion: All-in-one workspace

  • Databases and relations
  • Templates and blocks
  • Collaboration features
  • Web clipper
  • API integration
  • AI features

• Roam Research: Networked thought tool

  • Block references
  • Daily notes
  • Graph database
  • Bidirectional links
  • Query system
  • Subscription-based

• RemNote: Flashcard-integrated notes

  • Spaced repetition built-in
  • Bidirectional linking
  • Document editor
  • PDF annotation
  • LaTeX support

• Mem: AI-powered notes

  • Smart search
  • Auto-tagging
  • Chat interface
  • Time-based organization

Hybrid Approaches

• Capacities: Object-based notes

  • Typed content blocks
  • Local and cloud
  • Graph view
  • Daily notes

• Tana: Flexible workspace

  • Super tags
  • Live queries
  • Supertags and fields
  • AI integration

PKM Methodologies

Zettelkasten

• Atomic notes (one idea per note)
• Unique identifiers
• Link-based connections
• Literature notes and permanent notes
• Index notes
• Developed by Niklas Luhmann

PARA Method

• Projects: Active work with deadlines
• Areas: Ongoing responsibilities
• Resources: Topics of interest
• Archives: Inactive items
• Created by Tiago Forte

Building a Second Brain (BASB)

• CODE framework:
  • Capture: Save valuable information
  • Organize: Sort into PARA
  • Distill: Extract key insights
  • Express: Create outputs
• Progressive summarization
• By Tiago Forte

Evergreen Notes

• Notes that grow over time
• Densely linked
• Concept-oriented
• Refined through iteration
• Advocated by Andy Matuschak

Supporting Tools

Reference Management

• Zotero: Research reference manager

  • Browser plugin
  • PDF reader and annotation
  • Citation export
  • Group libraries
  • Free and open-source

• Mendeley: Academic reference manager

• Calibre: E-book management

• Readwise: Highlight syncing

• Hypothesis: Web annotation

Web Clipping

• Raindrop.io: Bookmark manager
• Pocket: Read-it-later service
• Instapaper: Article saving
• Matter: Reader app
• Omnivore: Open-source read-later

Diagramming and Visual Tools

• Excalidraw: Hand-drawn diagrams
• tldraw: Whiteboard tool
• Mermaid: Diagram as code
• diagrams.net (draw.io): Flowcharts

Spaced Repetition

• Anki: Flashcard system
• SuperMemo: Original SR system
• RemNote: Built-in flashcards
• Mochi: Beautiful flashcards

Integration and Automation

Sync and Backup

• Git version control
• Cloud storage (Dropbox, iCloud, Google Drive)
• Obsidian Sync (official)
• Syncthing (open-source)

Automation

• Zapier: No-code automation
• IFTTT: If-this-then-that
• n8n: Self-hosted automation
• Apple Shortcuts: iOS automation

Publishing

• Obsidian Publish: Official publishing
• Quartz: Static site generator
• Jekyll/Hugo: Static sites from Markdown
• Notion websites: Public pages

Mobile Solutions

iOS

• Obsidian Mobile
• Logseq Mobile
• Notion Mobile
• Craft
• Bear
• Agenda

Android

• Obsidian for Android
• Logseq for Android
• Notion for Android
• Joplin
• Standard Notes

Community and Learning

Communities

• Obsidian forums and Discord
• r/ObsidianMD, r/Zettelkasten
• r/PKMS (Personal Knowledge Management Systems)
• Linking Your Thinking (LYT)
• Building a Second Brain community

Courses

• Linking Your Thinking (Nick Milo)
• Building a Second Brain (Tiago Forte)
• Obsidian Flight School
• Smart Notes with Obsidian

Resources

• "How to Take Smart Notes" by Sönke Ahrens
• "Building a Second Brain" by Tiago Forte
• Zettelkasten.de blog
• Andy Matuschak's notes (public)
• Maggie Appleton's digital garden

Use Cases

• Academic research and writing
• Learning and studying
• Creative writing and ideation
• Project management
• Technical documentation
• Book notes and reading lists
• Daily journaling
• Building a digital garden
• Content creation workflow

Pricing

Free Options:

• Obsidian (free for personal use, paid for commercial)
• Logseq (free and open-source)
• Foam (free and open-source)
• Zettlr (free and open-source)
• Joplin (free and open-source)

Paid/Freemium:

• Notion (free tier, paid from $8/month)
• Roam Research ($15/month)
• RemNote (free tier, paid from $6/month)
• Obsidian Sync ($4/month, optional)
• Obsidian Publish ($8/month, optional)
• Mem (paid, $8.33/month)
• Tana (free tier, paid from $10/month)