Horos - A free, open source 64-bit DICOM medical image viewer
Vesalius3D - Vesalius3D is a toolkit for visualization of patient specific anatomy
Weasis - Weasis is a multipurpose standalone and web-based DICOM viewer.
AMIDE - AMIDE: a Medical Image Data Analysis Tool
3D Slicer - Slicer is a community platform created for the purpose of subject specific image analysis and...
Materialise Mimics - Materialise Mimics is software specially developed by Materialise for medical image processing.