Today at GUADEC I presented the results (Slides are now on slideshare) of the GNOME Census, a project we have been working on for a while. For as long as I have been involved in GNOME, press, analysts, potential partners and advisory board members have been asking us: How big is GNOME? How many paid developers are there? Who writes all this software, and why?

By looking at the modules in the GNOME 2.30 release, made last March, we aim to answer many of those questions, and give deeper insight into the motivations of participants in the project.

GNOME activity over time, horizontal bars are release dates

Here are our key findings:

• GNOME has a rhythm – there is a measurable increase in activity before release time, and after the annual GNOME conference GUADEC
• While over 70% of GNOME developers identify themselves as volunteers, over 70% of the commits to the GNOME releases are made by paid contributors
  

  GNOME committer self-identification - volunteer/professional

• Red Hat are the biggest contributor to the GNOME project and its core dependencies. Red Hat employees have made almost 17% of all commits we measured, and 11 of the top 20 GNOME committers of all time are current or past Red Hat employees. Novell and Collabora are also on the podium.
• A number of top company contributors are consultancy/services companies specialising in the GNOME platform – Collabora, CodeThink, Openismus, Lanedo and Fluendo are in the top 20 companies. As many of these companies grew initially through work on Maemo, this is a sign of the success of Nokia’s strategy around the GNOME stack.

One of the interesting things that we have done for the census is to look at who is maintaining modules by looking at commits over the past two years, and use this data to identify areas of the platform which see lots of collaboration, areas where the maintenance burden is left to volunteers, and areas where individual companies assume most of the maintenance burden.

There are a number of modules in the platform which see a considerable amount of co-opetition, including Evolution, Evolution Data Server, DBus and GStreamer. Most modules in the platform, however, are either maintained to a large extent by volunteer developers, or see the vast majority of their contributions from one company.

I see this information being useful for companies interested in using the GNOME platform for their products, companies seeking custom application development, potential large-scale customers of desktop Linux or customers buying high-level support who want to know who employs more module maintainers or committers to the project.

The GNOME maintenance map, with modules coloured according to the company maintaining them

Update: The release has now been published under a Creative Commons licence on October 1st 2010.

GNOME activity over time, horizontal bars are release dates