Amide's a Medical Imaging Data Examiner (AMIDE) is a completely free tool for viewing, analysing, and registering volumetric medical imaging data sets. It's been written on top of GTK+ , and runs on any system that supports this toolkit (Linux, Windows, Mac OS X with fink, etc.).
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GNU Health (previously known as "Medical") is a free Health and Hospital Information System that provides the following functionality:
- Electronic Medical Record (EMR)
- Hospital Information System (HIS)
- Health Information System
GNU Health at a glance: