miniPaint - Online graphics editing tool use HTML5 technologies like Canvas, Offline support, Drag and Drop.
Horos - A free, open source 64-bit DICOM medical image viewer
RealWorld Paint - RealWorld Paint is an free portable image/photo/animation editor.
MicroDicom - DICOM viewer. MicroDicom is a free DICOM viewer. Export to the most common picture formats, movie, clipboard. It is equipped with most common tools for manipulation of DICOM images.
JugiPaint - JugiPaint is a painting software with diverse tools for various types of illustration work.
3D Slicer - Slicer is a community platform created for the purpose of subject specific image analysis and...