Open Atrium is a team portal starter package. What makes it unique is that it's extensible and customizable. This means that you - and everyone - can develop new features for it, add other modules, change the skin, totally re-factor the workflow, and do anything else that you can think up to make Open Atrium meet your exact needs. Check out the Developer FAQ to get started.

We open sourced Open Atrium because we see it as a seed for something much larger - a community that makes great team communications tools. And it's working. Open Atrium is being translated in more than twenty languages and several hundred people are growing its base of features. Together we can develop the most advanced knowledge management tools.

This is all possible because everyone can access all of the code. Most of Open Atrium's source code falls under GPL v. 2 b, since it's built on the open source Drupal framework. All the code that's not under GPL has a BSD license, which keeps it just as open and gives people even more flexibility.

Get started by downloading Open Atrium now and joining the community. To see how you can use Open Atrium, please review details on its licensing.

The Open Atrium project started at Development Seed. Our work with international development agencies with dispersed teams working from all corners of the world forced us to become great at building collaborative communications spaces.

Our entire team worked to make Open Atrium what it is today. If you work with the code, you'll become especially familiar with Young Hahn and Jeff Miccolis, the project's lead developers.

Open Atrium is also the result of the amazing Drupal community that we're lucky to work with every day, and who have built the base that Open Atrium runs on.

The real value and potential of Open Atrium lies with a much larger circle of developers, like you. So get involved on the community site and GitHub. Help translate Open Atrium into another language, and blog about it to let us know how we can all make it better.

Open Atrium is completely open source (licensing details here). Why? Because for Open Atrium to be one of the best collaboration tools out there, the teams using it need to have full control over how it works.

Most of Open Atrium's code base is GPL v. 2, inherited from Drupal, the open source platform that's the backbone of the package.

Open Atrium is completely open source. Why? Because for Open Atrium to be one of the best collaboration tools out there, the teams using it need to have full control over how it works.

Most of Open Atrium's code base is GPL v. 2, inherited from Drupal, the open source platform that's the backbone of the package. Pieces that aren't specifically Drupal - like the themes that Open Atrium comes with - are licensed under BSD.

For those who are new to open source, the story goes something like this. In what is seen as the most productive reaction in history to being pissed off at an office printer, Richard Stallman started the free software movement (among other things) to promote the right for people to be able to modify software, rather than be stuck with proprietary software with restrictive licensing.

Drupal is a killer open source content management framework that's easy to modify and has a user base of hundreds of thousands of people. It got its start in the dorm room of Dries Buytaert, where he released the code to a little PHP content management system that he was working on with friends. The rest is history. The very active community that Dries helped bring together is flying today, with an estimated 240,000 websites powered by Drupal 6. Open Atrium is one, being built on Drupal 6 core.

Six years ago when Development Seed got its start in the mountains of Peru, Drupal looked like a great framework to help international development organizations collaborate online. Drupal has treated us well, and over the years we've attracted a team that wants to change the world by building powerful open source projects. One way we do this is to make sure all our work is open so it has the biggest impact possible. Open Atrium is one of our most recent projects.