This plugin adds 3D tools to ImageJ.
The plugin comprises tools for 3D drawing :
A 3D crop is available (cubic or spherical cropping), it works also with a list of points in the RoiManager to automatically crop all positions and save them.
A 3D radial distribution is available, it computes the mean value of pixel in surrounding spherical layers.
A plugin to draw contours of 3D objects, using a 3D labeled image as input.
3D random ellipsoids : Macro
For details go to the 3D ImageJ Suite.
GPL distribution (see license).