openDICOM.NET - DICOM library, console tools, DICOM viewer/browser for Mono/.NET and Beagle Desktop Search Plugin. The project supports ACR-NEMA and DICOM file formats and provides transcoding to XML. It is written in C# and licensed under (L)GPL.
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FW4SPL is a component-oriented architecture with the notion of role-based programming. FW4SPL consists of a set of cross-platform C++ libraries. For now, FW4SPL focuses on the problem of medical images processing and visualization.