euclid@projects ~ % now shipping Euclid Notes 3.0
Open science, open source

Productivity tools for open science.

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
The Suite

Three apps, one research workflow

Read, annotate, take notes, and study — all built on open formats so your work is never locked to one app.

Made For

Built for how research actually happens

From a first-year lab notebook to a decade-long dataset.

RESEARCHERS

Euclid for Labs

STUDENTS

Euclid for Coursework

EDUCATORS

Euclid for Classrooms

CITIZEN SCIENTISTS

Euclid for Independent Study

Everywhere You Work

Available on every platform

Your notes, papers, and cards stay in sync wherever you open them.

desktop

Desktop

Native apps for Linux, macOS, and Windows.

web

Web

Full functionality in any modern browser, no install needed.

tablet

Tablet

Stylus-friendly annotation for reading on the go.

mobile

Mobile

Review flashcards and notes from your pocket.

Announcements

What's shipping

10 Jul 2026

Euclid Notes 3.0 adds real-time collaborative editing

Read more →
02 Jul 2026

Euclid PDF Reader now extracts citations automatically

Read more →
24 Jun 2026

Euclid Flashcards 1.6 fixes the spaced-repetition scheduler

Read more →
15 Jun 2026

Euclid Sync Framework 2.1 released

Read more →
Community

Meet up, in person and online

6 – 9 Aug 2026 · Remote-friendly

Open Science Summit

The annual gathering of maintainers, researchers, and new contributors.

19 Sep 2026 · Regional

Euclid Local: Berlin

A one-day meetup for the community's contributors in Europe.

Ongoing · Forum & chat

First Contribution Office Hours

Weekly drop-in help for anyone sending their first patch.