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.
1,447 tools · A to Z, so position is not a ranking
- Whiteboards & mind maps
iMindQ
iMindQ is mind mapping and brainstorming software for Windows and other platforms with flowchart support.
- Screenshots & capture
INBOARD
Inboard organizes screenshots, images and photos into boards so designers can keep their inspiration out of Finder folders.
- Whiteboards & mind maps
Inclr
Inclr is a visual mind mapping app that lays out notes, ideas, research and projects spatially.
- Whiteboards & mind maps
Infinity Maps
Infinity Maps combines a whiteboard and a wiki so people can build visual knowledge maps and share them with collaborators.
- Notes & knowledge bases
Infinote
Infinote is an offline note-taking app built around a single page with infinite scroll.
- Notes & knowledge bases
Infoplane
Infoplane stores small personal details such as numbers and settings as short notes on iPhone, iPad and Mac for quick recall.
- Whiteboards & mind maps
Ink2Go
Ink2Go is screen annotation and recording software for presentations and teaching.
- Notes & knowledge bases
Inkdrop
Inkdrop is a Markdown note-taking app for developers with tags, sync across devices and AI features.
- Notes & knowledge bases
InkNote
InkNote brings handwritten notes, documents, planners and lecture recordings into one workspace on Apple devices.
- Notes & knowledge bases
Inkpad Notepad
Inkpad Notepad is a notes and list app that syncs across Android, iOS and the web.
- Notes & knowledge bases
InkSpace
InkSpace is a free iPad and iPhone notebook combining handwriting, PDF markup, live math, diagrams and cited papers for students.
- Notes & knowledge bases
Inkstone
Inkstone is a native Mac Markdown editor for working with any Markdown file stored locally on your computer.
- Read-later & research
Inoreader
Inoreader is an RSS reader and news aggregator that follows websites, social feeds and podcasts in one place.
- Whiteboards & mind maps
Instaboard
Instaboard is an online whiteboard where you arrange cards, lists, photos and handwriting, and share a link to collaborate.
- Read-later & research
Instapaper
Instapaper saves web pages so you can read them later on phones, computers or e-readers.
- Screenshots & capture
Irchiver
Irchiver captures full-resolution screenshots of the web pages you visit and makes your whole browsing history searchable by text.
- Screenshots & capture
Iris
Iris is a Mac screen recorder that captures two sources at once with Mac audio, sold as a subscription or lifetime purchase.
- Whiteboards & mind maps
iThoughts
iThoughts is a whiteboard and mind mapping tool covering mindmap, available on the web and Mac, Windows and iOS.
- Notes & knowledge bases
IVGraph
IVGraph adds an interactive 3D graph view to Notion, showing pages, backlinks and database relations as a connected map.
- Read-later & research
ivySCI
ivySCI organizes papers and PDFs and connects AI tools such as Claude and Cursor through MCP to search research databases.
- 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.
- Read-later & research
JabRef
JabRef is a free, open-source reference manager for collecting and organizing research sources and citations.
- Read-later & research
JClub
JClub turns the newest papers from the journals you follow into cards you swipe through on iOS and Android.
- Whiteboards & mind maps
Jeda.ai
Jeda.ai is an AI whiteboard that generates mind maps, flowcharts, and business frameworks on one canvas using several AI models.
- 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.
- Screenshots & capture
Joxi
Joxi captures any part of the screen, lets users add arrows, text and blur, and creates a shareable link right away.
- Read-later & research
Junco
Junco is an iOS app that connects to Gmail and reads your newsletters aloud as a daily podcast.
- Read-later & research
Just Bookmarks
Just Bookmarks saves links into collections and tags, flags links that stop working and syncs through your own iCloud.
- Read-later & research
Just Read
Just Read is a browser extension that shows web articles in a clean, customizable reading view.
- Read-later & research
Kajr
Kajr saves links, videos, PDFs and photos on your device and lets you ask questions that an AI answers from what you saved.
- Notes & knowledge bases
Kanka
Kanka organizes RPG campaigns, characters, maps and timelines in one worldbuilding tool for game masters and writers.
- Read-later & research
Kanso RSS
Kanso RSS is an iOS RSS reader with feed discovery, a distraction-free reading mode and handwritten notes on articles using Apple Pencil.
- Read-later & research
Karakeep
Karakeep is an open source bookmark manager that saves links, notes and images and tags them automatically with AI.
- Read-later & research
Kavita
Kavita is a self-hosted library server for comics, manga, EPUB and PDF files with a built-in reader.
- 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.
- Screenshots & capture
Keepsi
Keepsi is a free, private phone app that finds saved screenshots, asks why you kept each one and files it or lets it go.
- Read-later & research
KeepSpot
KeepSpot saves articles, recipes, links, screenshots, notes and files on iPhone and iPad without needing an account.
- 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.
- Read-later & research
Keytakes
Keytakes is a macOS app that shortens spoken audio and video files by extracting the key parts into a condensed version.
- 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.
- Screenshots & capture
kilde
kilde is an open-source macOS screen recorder that captures system audio that QuickTime Player cannot record.
- Whiteboards & mind maps
Kinopio
Kinopio is a spatial note-taking tool for collecting and connecting thoughts on a freeform canvas.
- 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.