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
Groupboard
Groupboard is an online whiteboard for tutoring and web conferencing that runs in the browser.
- Whiteboards & mind maps
GroupMap
GroupMap is an online tool for group brainstorming, voting and decision-making in meetings and workshops.
- Notes & knowledge bases
GROWI
GROWI is a free, open-source Markdown wiki for teams to share and organize documents.
- Notes & knowledge bases
GROWI Cloud
GROWI.cloud is a hosted in-house wiki that helps organizations write and share internal knowledge.
- Notes & knowledge bases
Guru
Guru is an AI search engine.
- Whiteboards & mind maps
HackerDraw
HackerDraw is an online platform where teams create and manage technical diagrams and brainstorm together on a shared canvas.
- Notes & knowledge bases
Haven Notes
Haven Notes is an iOS Markdown notes app with wiki links, a knowledge graph and encryption, with no AI or tracking.
- Read-later & research
Headlines
Headlines is a reader app that gathers your sites and newsletters into one comfortable reading place so you can focus on reading.
- Notes & knowledge bases
Hejour
Hejour is a Mac notes app where every day is a page, with links between days and todo tracking.
- Notes & knowledge bases
HelixNotes
HelixNotes is a free local Markdown note app that stores notes as ordinary files on disk and lets you sync them yourself.
- Read-later & research
Helperbird
Helperbird is a browser extension with dyslexia fonts, text-to-speech and writing aids for reading and accessibility.
- Notes & knowledge bases
Helpie
Helpie is a WordPress plugin for building knowledge bases, wikis and FAQs with frontend editing and access control.
- Notes & knowledge bases
Heptabase
Heptabase is a visual knowledge base where you lay out notes on whiteboards to understand and build ideas.
- Notes & knowledge bases
Heynote
Heynote is a persistent scratchpad that splits one large text buffer into blocks, made for developers' quick notes.
- Notes & knowledge bases
Hi Sticky
Hi Sticky keeps sticky notes on the iPhone Home Screen and beside your work on Mac, synced with iCloud.
- Read-later & research
Highlights
Highlights is a free PDF reader for Mac, iPad and iPhone for annotating and extracting highlighted notes.
- Notes & knowledge bases
Hikki
Hikki is a local-first block-based notes app for iPhone, iPad and Mac that works offline and syncs through your iCloud.
- Read-later & research
Hindsight
Hindsight is an RSS and news reader that helps you keep up with chosen sources without unread counts or constant refreshing.
- Notes & knowledge bases
Hirsla
Hirsla is an iPhone, iPad and Mac app for keeping small facts such as door codes and details about people, with on-device AI search.
- Read-later & research
historious
Historious is a bookmarking tool with full-text search across the pages you save.
- Whiteboards & mind maps
Histropedia
Histropedia lets users build and explore interactive timelines for history, stories, projects, and collections.
- Whiteboards & mind maps
Hlu
Hlu is an iPhone, iPad and Mac canvas where you arrange plans, notes and routines and then start timers from them.
- Whiteboards & mind maps
HMind
HMind is a free online mind map maker for organizing notes, brainstorming and planning projects.
- Screenshots & capture
Hokaku
Hokaku is a native macOS menu bar app that captures any region, window or screen, records regions to MP4 and marks them up.
- Notes & knowledge bases
Hono
Hono stores your links, notes and files in one place and lets you ask an AI questions about what you saved.
- Read-later & research
Hubble
Hubble runs AI moderated interviews, usability tests, and surveys, with participant recruitment and summarized findings.
- Notes & knowledge bases
HULOG
HULOG is an iOS and Mac app that stamps each note with the time and builds a log, handy for meetings.
- Read-later & research
Humata
Humata turns your documents into a searchable knowledge base you can question, with answers tied to the source files.
- Screenshots & capture
Hunchly
Hunchly is a browser tool that automatically captures and organizes web pages for online investigators.
- Notes & knowledge bases
Hydra Notes
Hydra Notes is a fast dark-themed Markdown notes app that works offline and syncs between devices keystroke by keystroke.
- Read-later & research
HyperMark
Hyper Mark turns your bookmarks into an AI-powered knowledge base and lets Pocket users import their saved links.
- Read-later & research
HyperRESEARCH
Researchware makes HyperRESEARCH and HyperTranscribe, software for qualitative research and transcription.
- Read-later & research
Hypothesis
Hypothesis is a tool for annotating web pages and documents together, widely used in classrooms.
- Screenshots & capture
i2OCR
i2OCR extracts text from images and scanned PDFs online in 128 languages for free.
- Whiteboards & mind maps
IdeaBoardz
IdeaBoardz is a tool for running brainstorming and retrospective sessions on shared boards with remote teams.
- Whiteboards & mind maps
Ideaflip
Ideaflip is an online sticky note tool for planning, brainstorming and organizing ideas with a team.
- Notes & knowledge bases
Idealize
Idealize is a brain dump app for ADHD users that sorts rambled thoughts, reminds you on time and gives each item a small first step.
- Whiteboards & mind maps
IdeaMap
Ideamap is a visual workspace where teams brainstorm and use AI to develop ideas.
- Whiteboards & mind maps
Ideas Mind Mapping
Ideas is a mind mapping app that connects with Todoist so you can map ideas and turn them into tasks.
- Notes & knowledge bases
Igneous
Igneous is a native Swift notes app for iPhone, iPad and Mac that stores notes as plain .md files in a folder.
- Notes & knowledge bases
Ikes
Ikes stores notes, quotes and inspirations in one searchable place, free to use without registration.
- Read-later & research
iLinkVault
iLinkVault keeps links, articles and research sources in a private vault and uses AI to find them by topic or half-remembered intent.
- Screenshots & capture
Image to Text
Image to Text extracts text from pictures with an online OCR converter.
- Screenshots & capture
Imagy Screenshot
Imagy Screenshot is a free native Mac app for capturing, annotating and sharing screenshots, with built-in Imagy cloud storage.
- Screenshots & capture
img2txt
Img2txt extracts text from images, screenshots, and PDFs online with OCR in over 120 languages.
- Screenshots & capture
ImgBB
ImgBB is a free image hosting service where users upload pictures and share links to them.
- Screenshots & capture
imgbox
imgbox is a free image host where people upload JPG, GIF and PNG files and share links to them.
- Screenshots & capture
Imgur
Imgur is an image hosting and sharing site for uploading pictures and posting them online.