COMSATS Open Source Healthcare Management System (COS-HMS) is designed and developed on scalable architecture and technologies like Java EE, MySQL, JBoss Application Server on Linux platform. It adheres the compliance of international standards like ICD-10 (World Health Organization's International Classification of Diseases), DICOM (Digital Imaging and Communications in Medicine) & LOINC (Logical Observation Identifiers Names and Codes).
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ClearHealth is a next generation practice management and EMR. It supports Demographics, Scheduling, Full Medical Billing, Disease Management, Decision Support, EPrescribing, HL7, and Web Services.
It is Meaningful Use (Certified HIT Product) certified by the U.S. Office of the National Coordinator for Health IT (ONC).
iPath is providing a free and open platform for "case based collaboration", especially designed for medical applications (telemedicine, etc). The iPath-Server package provides a sort of medical BBS to discuss/consult cases online. Additional modules are available.