In addition to the free open-source version of their content management software, eZ Systems offers a number of licensing options, some of which include a technical support subscription. That's apparently where the bulk of their revenue comes from, and they announced this past week that they enjoyed 583% growth in new subscription sales with a renewal rate of over 90% for the first half of 2008. These are incredible numbers and have given eZ Systems two profitable quarters in a row, their first ever.
Finally, I wanted to mention the release of eZ Publish 4.0.1, 3.10.1, and 3.9.5, various versions of their flagship content management system. Although they include just a handful of enhancements, these releases focus mainly on addressing some security issues and bug fixes, reportedly over 300 for eZ Publish 4.0.1 alone.
eZ Publish is a solid, well-regarded platform with a substantial user community, and is certainly worth a look for organizations considering an open source content management system. And 2.5 million downloads is pretty convincing, too.