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
- Screenshots & capture
OpenScreenShot
OpenScreenShot is a free open-source Chrome and Firefox extension that captures full-page screenshots, annotates them and saves as image or PDF locally.
- Notes & knowledge bases
Opensidian
Opensidian is an open-source Linux app that opens your existing Markdown vault with wikilinks, backlinks and a graph view.
- Notes & knowledge bases
Orange Cat
Orange Cat is a native Markdown notebook for Mac, iPad and iPhone to write, preview, organize and keep note versions.
- Notes & knowledge bases
Orgzly
Orgzly is an Android notes and to-do outliner using org mode notebooks synced with folders on the device.
- Notes & knowledge bases
Original
original is an editor that adds outline mode, backlinks, Markdown shortcuts and a formatting toolbar to the Apple Notes you already have.
- Read-later & research
Otio
Otio keeps PDFs, videos and web pages in one library and lets users chat with them and get cited summaries.
- Notes & knowledge bases
Outline
Outline is a team wiki for internal documentation, specs, meeting notes and onboarding material.
- Screenshots & capture
Outplayed
Outplayed automatically records gamers' best moments while they play so they can edit and share the clips.
- Screenshots & capture
OwlOCR
OwlOCR is a Mac app that pulls text from screenshots, scans and PDFs using Apple Vision or optional cloud AI models.
- Read-later & research
PACR
PACR is a research workspace where scientists search literature, organise papers into projects, write manuscripts with sources and collaborate.
- Whiteboards & mind maps
Padlet
Padlet is a tool for making shared boards where people post notes, links and media for visual collaboration and teaching.
- Read-later & research
PageForth
PageForth is a Mac news reader that summarizes any website, with no RSS feed needed, using Apple Intelligence.
- Read-later & research
PagePanda
PagePanda saves articles from Safari and other apps for offline reading in eight reader styles, with listen mode, highlights and notes.
- Whiteboards & mind maps
PairInk
PairInk is an app for sketching ideas, taking notes and annotating PDFs, keeping boards locally and syncing devices over Wi-Fi.
- Read-later & research
Panda
Panda is a simple free reader that gathers favorite design and tech sites into a browser homepage.
- Read-later & research
Panels
Panels is a comic reader for iPad, iPhone and Mac that organizes DRM-free comic files into a tidy library.
- Screenshots & capture
Paparazzi
Paparazzi! is a small macOS utility that captures full-length screenshots of web pages.
- Notes & knowledge bases
Paper
Paper is a free notes app with notebooks and checklists for Android, iPhone and Mac.
- Read-later & research
Paper Rooms
Paper Rooms is a free local-first library where you paste a paper link and it is filed under a call number and shelf.
- Read-later & research
Paper Scout
Paper Scout reads new PubMed papers, ranks the few that matter to your research and explains in plain English why each was chosen.
- Read-later & research
Paper2Pod
Paper2Pod turns uploaded research paper PDFs into podcast-style audio using AI so you can listen instead of reading.
- Read-later & research
PaperDue
PaperDue lists academic conferences by research area with submission deadlines and countdowns so researchers can plan submissions.
- Read-later & research
Paperguide
Paperguide is an AI platform for literature reviews and systematic reviews, with a reference manager and AI search.
- Read-later & research
Paperlib
Paperlib is an open source academic paper manager for organizing and reading research papers.
- Read-later & research
Paperpile
Paperpile is a reference manager that helps researchers collect, organize, share and cite papers from the browser and Google Docs.
- Read-later & research
Papers
ReadCube is software for managing, reading and annotating scientific papers and references.
- Read-later & research
PaperSays
PaperSays turns new research papers into ten-minute audio briefings on iPhone that you can question, with claims tied to sources.
- Read-later & research
PaperSpan
PaperSpan saves web articles, strips the clutter and lets you read or listen to them without ads or tracking.
- Notes & knowledge bases
Papyrs
Papyrs is an intranet and team wiki tool for small companies to share documents and company information.
- Read-later & research
Parsifal
Parsifal helps researchers plan and run systematic literature reviews, from search strategy to selection and data extraction.
- Screenshots & capture
Pasteboard
Pasteboard lets you paste screenshots and images from the clipboard and instantly get a shareable link for sending.
- Screenshots & capture
Pastel
Pastel lets designers, developers and agencies collect visual comments directly on a live website and share them with clients.
- Notes & knowledge bases
PBworks
PBworks is a team wiki for capturing knowledge, sharing files and managing projects in one workspace.
- Read-later & research
PDF.ai
PDF.ai lets you chat with PDFs to ask questions and get summaries, with an API to parse, extract and split documents.
- Read-later & research
Pearltrees
Pearltrees lets people organize, collaborate on and share web pages, files and notes they find interesting.
- Notes & knowledge bases
PeekMark
PeekMark is a local-first Markdown viewer for Mac with Finder Quick Look previews, workspaces, search and backlinks.
- Notes & knowledge bases
Penbook
Penbook is an iPad app of digital paper notebooks with templates for notes, planning and bullet journaling.
- Notes & knowledge bases
Pencora
Pencora is a free iPad handwriting notebook that renders typed text in your own handwriting and searches everything you wrote.
- Screenshots & capture
Pensile
Pensile pins screenshots, recordings, files and notes beside your work so references stay in view, with a 14-day free trial.
- Notes & knowledge bases
Pentip
Pentip combines notes, PDF markup, flashcards and whiteboards in one handwriting-aware notebook for iPad, iPhone and Mac.
- Notes & knowledge bases
Personal Knowbase
Personal Knowbase is a Windows notes database that indexes free-form notes and ideas by keywords for later lookup.
- Read-later & research
PetalFeed
PetalFeed gathers blogs, Reddit, Mastodon, Bluesky and YouTube into one feed built for VoiceOver, with articles read aloud on Apple devices.
- Screenshots & capture
Photon
Photon is a free open-source app for Mac and Windows that captures screenshots, marks them up and records the screen.
- Notes & knowledge bases
PHPKB
PHPKB is knowledge base software for internal teams and customers, with AI-assisted search and answers, offered with a 30-day free trial.
- Read-later & research
Pickle
Pickle shows a small finite feed each day drawn from your own saved links, notes, photos, files and Obsidian vault.
- Read-later & research
PICO Portal
PICO Portal is AI software for systematic reviews, with screening, extraction and reporting and an audit trail.
- Screenshots & capture
PicPick
PicPick is a Windows tool for capturing, editing and sharing screenshots with an image editor.
- Screenshots & capture
Picsew
Picsew stitches screenshots and photos into one long image, and offers scrolling capture for chats and articles on iPhone and iPad.