Think & Capture
1,447 verified tools in 4 sections. Pick a section, search, or filter by free plan and country.
Capture ideas, organize notes and build a searchable knowledge base. Explore note-taking apps, whiteboards, research tools and screen capture software.
457 tools in Notes & knowledge bases · A to Z, so position is not a ranking
- Notes & knowledge bases
IVGraph
IVGraph adds an interactive 3D graph view to Notion, showing pages, backlinks and database relations as a connected map.
- Notes & knowledge bases
IWE
IWE is a Mac app and editor plugin for Markdown notes that lets you and AI coding agents share one knowledge base.
- Notes & knowledge bases
Jetfold
Jetfold is a native Mac notes app that works on a folder of plain Markdown files while hiding the markup.
- Notes & knowledge bases
Joplin
Joplin is an open source note taking app that syncs notes securely between desktop and mobile devices.
- Notes & knowledge bases
Jot
Jot is a Mac notes inbox that captures text with a keystroke and saves it as a plain Markdown file.
- Notes & knowledge bases
Jotaid
Jotaid is a Mac and iPhone notes app that maps notes into a concept graph to reveal connections between ideas.
- Notes & knowledge bases
JotBox
JotBox is a local-first scratchpad for iPhone, iPad and Mac that opens a blank draft for quick notes.
- Notes & knowledge bases
JotNow
JotNow is a macOS note manager that combines Markdown writing, blogging and keyboard-driven navigation, aimed at fast thinkers.
- Notes & knowledge bases
Kanka
Kanka organizes RPG campaigns, characters, maps and timelines in one worldbuilding tool for game masters and writers.
- Notes & knowledge bases
KBPublisher
KBPublisher is knowledge base software for publishing and managing articles, manuals and FAQs, available as a cloud service or self-hosted install.
- Notes & knowledge bases
Kept Notes
Kept is a colorful notes app for iOS and Android that works offline, and can sync through a self-hosted server or a paid cloud.
- Notes & knowledge bases
Kihya Memo
Kihya Memo is a free offline-first Markdown and text editor that uses real files, with optional Drive sync and SFTP.
- Notes & knowledge bases
Kipwise
Kipwise is an AI agent for Slack and Teams that answers questions from a team's knowledge base and tracks requests.
- Notes & knowledge bases
Knap
Knap is a fast reader and editor for a folder of Markdown files, with instant search across thousands of notes.
- Notes & knowledge bases
Knowto
Knowto is a local-first notes app for capturing thoughts and finding them quickly, working offline on Apple devices.
- Notes & knowledge bases
Kortex
Kortex is a second brain app that gathers ideas, notes, highlights and writing in one place with AI synthesis.
- Notes & knowledge bases
Kuku
Kuku is a local-first Markdown notes app for macOS with wikilinks, backlinks, a graph view and AI editing.
- Notes & knowledge bases
KUU
KUU is a voice-first brain-dump app that sorts what you say into Now, Later and Park lists so you can stop carrying it.
- Notes & knowledge bases
LabArchives
LabArchives is an electronic lab notebook where scientists record, organize, search, and share research data.
- Notes & knowledge bases
Labfolder
Labfolder is an electronic lab notebook with a companion inventory tool for managing lab records and samples.
- Notes & knowledge bases
LaterLoom
LaterLoom is a native Mac app that captures notes, tasks and ideas and brings the right ones back at the right time.
- Notes & knowledge bases
Lattics
Lattics is a knowledge management and academic writing app for Mac and Windows that links notes like a brain.
- Notes & knowledge bases
Leanote
Leanote is a note taking app with sharing, blogging and collaboration features.
- Notes & knowledge bases
Lectra Notes
Lectra Notes is a free iPad note-taking app for students, with Apple Pencil markup of lecture slides and PDFs and an offline library.
- Notes & knowledge bases
Ledge.sh
Ledge is a notes app for developers and DevOps where you run code blocks in place and see output stream beneath them.
- Notes & knowledge bases
LegendKeeper
LegendKeeper is a collaborative wiki and map tool for game masters and storytellers to build and share worlds.
- Notes & knowledge bases
LibreKB
LibreKB is a free knowledge base web app built on PHP and MySQL that you install on your own server to publish documentation.
- Notes & knowledge bases
LinkEdit
LinkEdit is a local-first personal knowledge manager that works directly on a folder of Markdown notes on Mac and mobile.
- Notes & knowledge bases
Lionote
Lionote is a free, privacy-first notes app for desktop and mobile with handwriting, mind maps and local storage.
- Notes & knowledge bases
Loam
Loam is a Markdown notes app with live formatting and real-time editing that you can share with people and AI agents.
- Notes & knowledge bases
Local AI Notes
Local AI Notes is an iPhone and Mac notebook that sorts notes by meaning and sets reminders from plain language, on-device.
- Notes & knowledge bases
LocArk
LocArk is a local-first workspace with offline encrypted notes and a password vault, plus paid kanban boards and mind maps.
- Notes & knowledge bases
Lockbook
Lockbook is an open-source notes app for markdown and drawings, encrypted on the device and shared only with chosen people.
- Notes & knowledge bases
LockScreenNotes
LockScreenNotes puts a large, styled note on your iPhone Lock Screen so you can write or tick off to-dos without unlocking.
- Notes & knowledge bases
Locus
Locus is a free, offline Notion-style notes and docs app for Mac with a lifetime license option.
- Notes & knowledge bases
LogicalDOC
LogicalDOC is document management software for organizing, securing, searching and sharing business documents, offered as community and paid editions.
- Notes & knowledge bases
Lognote
Lognote is an offline-first notes app for iPhone, iPad and Mac that adds a timestamp to every entry, no account needed.
- Notes & knowledge bases
Logseq
Logseq is a privacy-focused open source app for outlining notes and linking ideas into a personal knowledge base.
- Notes & knowledge bases
Lorem
Lorem is a free local-first Markdown notes app for Mac, iPhone, iPad, Windows and Linux that needs no account.
- Notes & knowledge bases
Lucid-Notes
Lucid Notes is a Mac notes app with a transparent floating window and teleprompter for keeping notes visible during calls.
- Notes & knowledge bases
Lumeo. Your second brain
Lumeo is a second brain app that captures thoughts by voice, links them in a constellation view and turns them into ideas.
- Notes & knowledge bases
MAI
MAI is a second brain notes app where you add notes by voice, record meetings with an AI notetaker and connect it to Claude.
- Notes & knowledge bases
Margin
Margin is a Mac app for reading Markdown files such as notes, Obsidian vaults and agent reports as clean pages.
- Notes & knowledge bases
Markdown Buddy
Markdown Buddy is a macOS Markdown editor and previewer with a workspace tree, find and replace, task lists and a link map.
- Notes & knowledge bases
Markdown Editor
MarkMono is a markdown notes editor for Windows, Mac, iOS and the browser that saves your notes to Google Drive.
- Notes & knowledge bases
Markdown Mate
MarkdownMate is a free native Markdown editor and notes app for Mac and Ubuntu with live preview, math and wiki links.
- Notes & knowledge bases
Markdown Peek
Markdown Peek is a native Mac Markdown viewer with Finder Quick Look, GitHub-style rendering and colored code.
- Notes & knowledge bases
MarkDown Reader
MarkDown Reader is a free lightweight viewer that opens any .md file on macOS, iOS and iPadOS and renders it cleanly.