Best 18 Tools for Organizing Knowledge in 2025

Bear is a writing and note-taking tool that runs on Apple devices. You type notes in plain text and add formatting using simple Markdown commands. This means you can make text bold, create headers, add links, or insert images without reaching for your mouse.

UpNote is a note-taking tool that helps you write, organize, and find your notes quickly. You can create notes with text, images, files, and even tables. The app works on iPhone, Android, Mac, Windows, and Linux, so you can access your notes from any device.

AFFiNE is a workspace application that brings together three main tools in one place: documents for writing and note-taking, whiteboards for visual thinking and drawing, and databases for organizing information. Unlike cloud-first tools, AFFiNE takes a local-first approach, which means your data lives on your computer first and only syncs to the cloud if you choose.

Tangent Notes is a note-taking app that treats your thoughts like a web of connected ideas. When you write, you can link notes together using simple double brackets, just like Wikipedia. As you follow these links, Tangent remembers where you have been and shows your path with sliding panels that move horizontally across your screen.

DeepNotes is a visual note-taking application that uses an infinite canvas approach. Instead of regular pages stacked on top of each other, you get unlimited space where notes can be placed anywhere and connected freely. Each note can contain other notes inside it, creating layers of information.

Reor is a note-taking application that uses artificial intelligence to help you manage your knowledge. When you write notes, the app automatically finds related content from your other notes and shows them to you. This helps you discover connections you might have missed.

Obsidian is a note-taking app that works with plain text files stored directly on your device. You can write notes, link them together, and see how your ideas connect through a visual graph. Unlike cloud-based tools, everything stays private on your computer.

Logseq is an open-source note-taking tool that helps you capture and connect your thoughts. Everything you write is stored as plain text files on your device, giving you complete control over your data. You never have to worry about a company shutting down or changing their prices because your files belong to you.

Capacities is a note-taking and knowledge management app built around objects instead of traditional folders. When you create a note about a person, book, or project, it becomes an object you can easily link to other notes. This makes finding connections between your ideas much simpler.

RemNote is a note-taking and learning platform that helps you remember what you learn. It combines several useful features in one place: organized note-taking, automatic flashcard creation, PDF reading and highlighting, and a smart review system.