iMorph is cross platform 3D image analysis software. It permits the morphological characterization of porous media, and more precisely cellular materials. The first step of the analysis is a macroscopical characterization of the different phases. It allows porosity, tortuosity, and specific surface measurement. The anisotropy is also quantified at the sample scale. In a second step, the software gives a morphological study at the pore scale. Automatic methods for cell extraction give access to shape analysis, classification, and orientation. Moreover, it permits a local voxel classification in order to identify local shape such as shell, plates, and rods. Finally, the software gives a topological description by generating the graphs of both the solid and fluid phase. The human interface is intuitive and can be used by a non-expert of image processing. 3D visualization uses OpenGL libraries and allows interaction with segmented objects. An XML samples database is used to store results belonging to a region of interest in the media.