The application that now runs the White House Web site is Drupal, but its underpinnings, the Lucene search service, is pure Apache Software Foundation (ASF), an all-volunteer membership that now exceeds 300 people, including some of the most respected talent in the open source community.

In its 10 years, ASF has become a shining example of the power of open source development and the group, now with 65 projects operating under its banner, shows no signs of slowing down. Just four years ago, the number of ASF projects stood at 25.

ASF will celebrate its 10th anniversary at this week's ApacheCon conference even though the official anniversary date is in June.

"I think [ASF] has shown to be successful in that there is a lot of good software that comes out of Apache that is widely used," said Doug Cutting, a member of the ASF board of directors, and the creator of the Lucene project. "We lead by example. That is something we aspire to do."

Cutting's leadership examples include three ASF projects – Lucene, Hadoop and Nutch. In addition, there are 33 projects in the Apache Incubator, and more than two dozen codebases being explored in the Apache Labs. It all operates within the Foundation, which is actually a membership-based non-profit corporation registered in Delaware.

From its beginnings with 21 members and the Apache HTTP Server, still the most popular Web servers in use, the foundation has forged a set of principles that continue to drive it today.

Unlike other open source organizations, before Apache hosts a project it has to be given to the ASF, which ultimately controls the intellectual property of all its projects. But the projects themselves run as semi-autonomous units within ASF, which provides members with legal protection from suits directed at foundation projects.

New members are by invite only, voted upon by existing members, and prove their value by contributing to a project or projects at the Foundation, which describes itself as a meritocracy.

"We build software on its merits, which is a pretty great model," Cutting says. "Hopefully we set a tone, but we don't force the Apache Way on other projects."

Cutting says the focus on building software and letting people do what they want to do with it is one of the important roles that ASF plays in the open source movement today. He says more people are building software today and calling it open source, "but if you look closely they are aiming for vendor lock-in."