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GNU Dr. Geo, be a Geometer!

A software to design & to manipulate interactive geometric sketches.
It helps kids to explore geometry. Distributed with its source code it is modify-me-ready and it runs on GNU/Linux, Windows and Mac OS X.

Dr. Geo demo

Dr. Geo is an educational oriented software. It's an observatory to explore geometry situation in an interactive way in opposition to figure drawn on a sheet of paper. The user interface was designed to be simple but efficient for young users. In spirit, it is a free education tool for schools where freedom and equality matter.

Its second aim is to be an open, easy to study, to modify and to extend interactive geometry software. It is distributed with its source code you can modify while using it. Ten years old kids use Dr. Geo to explore Euclidean geometric sketch, agile kids extend and program it with its embedded dynamic Pharo language and user interface.

Just like other interactive geometry software such as Cabri, Cinderella, Geogebra, Carmetal, with Dr. Geo the user creates a geometric sketch and manipulates it according to its constraints. What sets Dr. Geo apart from the other geometry software is the possibility of studying and even modifying/extending its source code while s/he is using it to create a figure. It is the GNU spirit in action!

Downloading Dr. Geo

The latest release 19.09b can be downloaded at http://drgeo.eu/download.

Source code

The Dr. Geo source code is at Launchpad, dev.drgeo.eu. To build it from its source code, you need:

But do not forget, the Dr. Geo source code can also be edited from itself while using it, from its integrated source code browser.


Documentation and help are found at http://drgeo.eu/help.

How to contact Dr. Geo team

Social network
Follow us on Mastodon
Mailing list
There is a mailing list for all kind of discussions related to Dr. Geo.
There is also a web based forum at http://forum.drgeo.eu with dedicated topics:
Instant chat
Instant discussion group is drgeo@irc.freenode.net. You need to install a IRC software to connect, or you can use a web client to connect directly (Nickname: your name, Channels: #drgeo).

Getting involved

Development of Dr. Geo, and GNU in general, is a volunteer effort, and you can contribute. For information, please read How to help GNU. If you'd like to get involved, it's a good idea to join the discussion forum.

Use the software!
Learn and use Dr. Geo, you may encounter bug or you may have ideas for new features. Several were developped at user requests.
Contact: forum, email, bug report whatever suit you.
We have pretty complete user guides in French and English. Its sources is the Texinfo format -- as requested for any GNU software. Help is welcome for proofreading, formating its contents or contributing chapters.
Documentation sources repository
Dr. Geo user interface needs to be localised to as much native languages as possible. To participate to this effort, visit its translation page. Translation is done online from your web browser, you only need a Launchpad account.
For development sources, issue trackers, and other information, please see the Dr. Geo project page.
See the open bug tickets.
Dr. Geo author is Hilaire Fernandes <hilaire AT drgeo.eu>; he's still maintaining it.


Dr. Geo is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

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