Open Source Census provides a global and collaborative effort to determine how much open source software is used. Participants download and run an OSS discovery tool to identify open source on their systems, then anonymously and voluntarily upload the data to the Open Source Census website. So far, the census has identified open source software on over 2000 machines, with the top 20 packages including Firefox, zlib, Xerces, and Xalan. The census also provides breakdowns of open source use by operating system, company size, databases, programming languages, and package versions.

1. Open Source Census Kim Weins SVP Products and Marketing OpenLogic

2. Global, Collaborative Census: How Much OSS is Used?

4. Participation to Date 275,000 installations of open source on 2000 machines

5. Linux Distributions Top 20 Open Source Packages

6. Lots of Open Source on Windows

7. Open Source is Used in Companies of All Sizes Company Size (# employees)

9. Databases

10. Languages

11. Projects by Version

12. Make Open Source Count! http://osscensus.org