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AWESOME BRAINS

Second Brain Apps

Table of Contents

Note-taking and Knowledge Management Apps

  • Obsidian 🖥️📱
    Markdown-based note editor with bidirectional linking and a graph view for connected notes. Free (but not fully open-source) with plugins for customization. 🏛️

  • Joplin 🖥️📱🌐
    Open-source note-taking and to-do app with end-to-end encryption, Markdown support, and synchronization with cloud services. 🐧

  • Logseq 🖥️📱
    A privacy-first, open-source knowledge management system based on a graph structure. Strong focus on bidirectional links and personal knowledge graphs. 🐧

  • TiddlyWiki 🖥️🌐
    A highly customizable, open-source personal wiki. Great for note-taking, journaling, and knowledge management. 🐧

  • Standard Notes 🖥️📱🌐
    A secure, open-source note-taking app with strong encryption. It emphasizes simplicity and privacy. 🐧

  • RemNote 🖥️📱🌐
    Combines notes and spaced repetition learning for knowledge retention, though not fully open-source, its core features are freely accessible. 🏛️

  • Anytype 🖥️📱🌐
    A privacy-focused note-taking and personal knowledge management app, currently in development with a focus on offline-first capabilities and decentralized data storage. Freemium. 🏛️

  • Outline 🖥️📱🌐🧑‍🤝‍🧑
    Open-source knowledge base and note-taking tool designed for teams, with a clean user interface and robust collaboration features. Can be self-hosted. 🐧

  • Notesnook 🖥️📱🌐
    A privacy-first, encrypted note-taking app with a focus on simplicity and security. It offers both free and premium plans and is a great alternative to Standard Notes. Freemium. 🏛️

  • Notion 🖥️📱🌐🧑‍🤝‍🧑
    Popular commercial note-taking and productivity app with databases, Kanban boards, and wikis. Widely used for personal and team knowledge management. Freemium. 💼

  • Evernote 🖥️📱🌐🧑‍🤝‍🧑
    Well-known commercial note-taking app with rich text support, to-do lists, and integrations. Available in free and premium plans. 💼

  • Roam Research 🖥️📱🌐
    A note-taking tool for networked thought, focusing on bidirectional linking. Popular among researchers and Zettelkasten enthusiasts. Paid. 💼

  • Craft 🖥️📱🌐
    A beautifully designed note-taking app for personal and collaborative use, with Markdown support and cross-platform availability. Freemium. 💼

  • Microsoft OneNote 🖥️📱🌐🧑‍🤝‍🧑
    Microsoft's widely used note-taking app with cloud syncing, suitable for both personal and collaborative use. Free with Microsoft 365 integrations. 💼

  • Apple Notes 📱🖥️
    Apple's default note-taking app, known for its deep integration with the Apple ecosystem (iOS and macOS). Simple but effective for many users. 💼

  • Bear 🖥️📱
    A minimalist and elegant Markdown-based note-taking app for macOS and iOS, with tagging and to-dos. Freemium

Task and Project Management Apps

  • Todo.txt 🖥️📱
    A simple, open-source task management system based on a text file format. You can integrate it with various platforms, ideal for those who prefer a minimalist approach.

  • Tasks.org 📱 (Android)
    Open-source task manager for Android, with customizable task lists, priorities, and reminders.

  • Focalboard 🖥️📱🌐🧑‍🤝‍🧑
    Open-source project management software, an alternative to Trello, designed to manage projects and tasks visually.

  • WeKan 🖥️📱🌐🧑‍🤝‍🧑
    Open-source Kanban board project management tool, similar to Trello.

Mindmapping and Visualization Tools

  • XMind 🖥️📱🌐
    Cross-platform mind mapping tool, available in both free and paid versions. Not open-source, but widely used for visual thinking.

  • FreeMind 🖥️
    Open-source mind-mapping tool for visualizing and structuring ideas and thoughts.

  • TiddlyMap 🖥️🌐
    A plugin for TiddlyWiki that adds mind-mapping features to the personal wiki, great for creating concept maps and visualizing notes.

Knowledge Collection and Archiving Apps

  • Wallabag 🖥️📱🌐
    Open-source alternative to Pocket and Instapaper for saving web articles to read later, with options for self-hosting.

  • Memex 🖥️📱
    Open-source web and knowledge organization tool, enabling you to save, annotate, and organize web pages.

Spaced Repetition and Personalized Learning Tools

  • Anki 🖥️📱
    Open-source tool for spaced repetition, widely used for flashcard-based learning.

  • SuperMemo 🖥️📱
    Not fully open-source but one of the pioneers of spaced repetition systems, focusing on learning efficiency.

Automation and Integration Tools

  • n8n 🖥️🌐🧑‍🤝‍🧑
    Open-source workflow automation tool, an alternative to Zapier, allowing integrations and complex workflows.

  • Huginn 🖥️🌐
    Open-source tool that helps you automate tasks by setting up "agents" to monitor and act upon web services.

Calendar and Time Management Apps

  • Etar 📱 (Android)
    Open-source calendar app for Android, lightweight and privacy-friendly.

  • Nextcloud Calendar 🌐🧑‍🤝‍🧑
    Part of the open-source Nextcloud ecosystem, offering calendar functionality with synchronization across devices.

Digital Note Cards and Knowledge Graphs

  • Heptabase 🖥️📱🌐
    A tool focusing on visual thinking and organizing information through note cards. Not open-source but designed for those who think visually.

  • Zettlr 🖥️
    Open-source Markdown-based note-taking app designed for Zettelkasten workflows, great for academic writing and knowledge management.

Markdown-based Tools

  • Joplin 🖥️📱🌐
    Repeated here because it's open-source, Markdown-based, and widely used for both note-taking and to-dos with strong encryption.

  • Zettlr 🖥️
    Open-source app focused on Zettelkasten and Markdown for personal knowledge management.

  • Standard Notes 🖥️📱🌐
    Repeated here because of its support for Markdown and open-source encryption for note-taking.

Databases and Repositories

  • Airtable 🖥️📱🌐🧑‍🤝‍🧑
    Not open-source but widely used for databases, acting as a hybrid of a spreadsheet and database.

  • Baserow 🖥️📱🌐🧑‍🤝‍🧑
    Open-source no-code database platform, a great alternative to Airtable, allowing team collaboration and data structuring.

  • Nextcloud 🌐🧑‍🤝‍🧑
    Open-source platform for file sharing, calendars, and notes with extensible modules, including databases and task management.