openCRX
openCRX is a professional-grade enterprise class open source CRM software product. With an official OSI certified BSD-style license, openCRX is a legitimate open source project without any proprietary code. Comunity members have opportunities to make use of the software and contribute directly to its advancement over time. The company's goal is to make openCRX a go-to reference service for CRM. Distributions can be downloaded from Sourceforge, and the SDK and accompanying source code can be obtained from the GIT repository. Popular iCalendar clients, such as Mozilla's Lightning, KDE Contact, Apple's iOS-Devices, and a couple different versions of Microsoft Outlook can be employed to connect to openCRX. Flexibility is a hallmark of the program, with the option of adding additional languages.