Euclid Projects builds free, open-source apps for researchers, students, and anyone doing careful work — no paywalled features, no locked-in formats, no tracking your data.
# install the whole suite $ curl -sL get.euclidprojects.io | sh Resolving packages… ✓ euclid-notes 3.0.0 ✓ euclid-pdf-reader 2.4.1 ✓ euclid-flashcards 1.6.0 # ready when you are
Read, annotate, take notes, and study — all built on open formats so your work is never locked to one app.
Linked, citable notes for literature reviews and lab work, with backlinks and local-first sync.
Annotate papers, extract citations, and export highlights straight into your notes.
Spaced-repetition study cards generated from your own notes and paper highlights.
From a first-year lab notebook to a decade-long dataset.
Your notes, papers, and cards stay in sync wherever you open them.
Native apps for Linux, macOS, and Windows.
Full functionality in any modern browser, no install needed.
Stylus-friendly annotation for reading on the go.
Review flashcards and notes from your pocket.
The annual gathering of maintainers, researchers, and new contributors.
A one-day meetup for the community's contributors in Europe.
Weekly drop-in help for anyone sending their first patch.