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Cost-Conscious Companies Turn to Open-Source Software - BusinessWeek - Digium and Zenoss make money by selling support services as well as extra features that enhance the software, such as high-end security.
Open Source: A Silver Lining in the Economic Slump - BusinessWeek - The companies are Zenoss, which makes networking monitoring software; SugarCRM, a seller of customer relationship management software; Alfresco, a maker of content management software for Web sites; and MuleSource, which sells infrastructure software.