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
KiteMind
KiteMind is an iPhone app where you say one sentence and on-device AI builds a mind map or flowchart, with no account.
- Read-later & research
Kiwix
Kiwix lets people read Wikipedia and other web content offline using its reader app and hotspots.
- Whiteboards & mind maps
Klaxoon
Klaxoon is a collaboration platform with a whiteboard and interactive tools for brainstorming and running workshops.
- Read-later & research
Klib
Klib imports Kindle, Apple Books and WeRead highlights on Mac for review and export to Markdown or Evernote.
- Whiteboards & mind maps
Kloni
Kloni is a Mac and iPhone mind mapping app with notes and tasks built in, so a branch can become real work.
- Notes & knowledge bases
Knap
Knap is a fast reader and editor for a folder of Markdown files, with instant search across thousands of notes.
- Read-later & research
KNOA
KNOA is a Chrome extension that captures highlights from web pages and PDFs and organizes them into source-backed knowledge.
- Notes & knowledge bases
Knowto
Knowto is a local-first notes app for capturing thoughts and finding them quickly, working offline on Apple devices.
- Read-later & research
Komga
Komga is a self-hosted media server that organizes and serves comics, manga and ebooks with a built-in reader.
- Read-later & research
KOReader
KOReader is an open-source document and e-book reader for e-ink devices and other platforms.
- Notes & knowledge bases
Kortex
Kortex is a second brain app that gathers ideas, notes, highlights and writing in one place with AI synthesis.
- Whiteboards & mind maps
Kosmik
Kosmik is an AI agent platform available on the web and Mac and Windows.
- Notes & knowledge bases
Kuku
Kuku is a local-first Markdown notes app for macOS with wikilinks, backlinks, a graph view and AI editing.
- Read-later & research
Kuratd
Kuratd uses AI to pull signals, trends and key takeaways out of podcast episodes.
- 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.
- Read-later & research
Kwent
Kwent saves articles from any browser into an email-style inbox, adds AI summaries and searches across everything you saved.
- 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.
- Read-later & research
Lamella for Tiny Tiny RSS
Lamella is a native reader for Tiny Tiny RSS servers that keeps read and unread state in sync across your devices.
- Read-later & research
Larder
Larder is a bookmark manager built for developers to save and find links quickly.
- Read-later & research
LastingPaper
LastingPaper converts webpages into ebooks for E-Ink Kindles and adds a highlights explorer and reading calendar.
- Read-later & research
Later
Later saves links, articles and videos to read or watch later, with no ads and no tracking.
- Read-later & research
Lateral
Lateral is a tool for searching, saving and organizing findings across research papers.
- Read-later & research
LaterList
LaterList stores saved URLs as cards with title, thumbnail and description, and prompts you when it is time to revisit them.
- 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.
- Read-later & research
LaterRead
LaterRead saves articles from the share menu and translates them offline on iPhone, iPad and Mac using Apple translation.
- Read-later & research
Laters
Laters saves links in seconds, organizes them in collections and lets you find them later on iPhone and web.
- Read-later & research
Laterwise
Laterwise saves products, highlights, tickets and articles from any app, compares prices and brings items back when relevant.
- Notes & knowledge bases
Lattics
Lattics is a knowledge management and academic writing app for Mac and Windows that links notes like a brain.
- Read-later & research
Laytr
Laytr saves links, recipes, videos, screenshots and PDFs from any app and reminds you on a day you pick.
- Notes & knowledge bases
Leanote
Leanote is a note taking app with sharing, blogging and collaboration features.
- Whiteboards & mind maps
LEANSTACK
Leanstack offers Lean Canvas and related tools, training and AI to help founders validate business ideas.
- Read-later & research
LearningUtils
LearningUtils answers questions about your PDFs, slides and documents with page citations and makes mindmaps and quizzes from them.
- 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.
- Whiteboards & mind maps
Lekh
Lekh is a diagram and whiteboard app that turns hand sketches into clean shapes on iPhone, iPad, Android and Mac.
- Screenshots & capture
LetsView
LetsView mirrors phone screens to computers and bundles AI tools such as chat, mind maps, and speech to text.
- Read-later & research
Letterboxx
Letterboxx is a Mac app for reading and organizing email newsletters outside the regular inbox.
- Read-later & research
Letterfy
Letterfy gathers newsletters from your inbox and followed blogs into one reader where you can save items for later.
- Read-later & research
Lettura
Lettura is a FreshRSS reader for iPhone, iPad and macOS that syncs on launch or in the background and organizes feeds.
- Read-later & research
Library Extension
Library Extension shows whether books and ebooks on a web page are available at your local library.
- 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.
- Read-later & research
Librera
Librera is an Android reader app for books and PDFs with many supported formats.
- Read-later & research
LifeFeed AI
LifeFeed AI saves links, reels, videos, screenshots and PDFs from any app, organizes them with AI and connects to chat assistants.
- Read-later & research
Lighthouse
Lighthouse is a content curation and feed reading tool that finds top articles across sources.
- Screenshots & capture
Lightscreen
Lightscreen is a small free Windows program that takes screenshots with hotkeys and saves or uploads them automatically.
- Screenshots & capture
Lightshot
Lightshot is a screenshot tool for Mac and Windows that captures part of the screen and saves or shares it quickly.