MacroPac - investigate the effects of changing particle shape, size and size distribution. MacroPac lets you look at the distribution of several different types of particles, and even includes a ShapeBuilder so you can build up your own custom shapes. Shaking and settling is included, as is a Diffusion module. If you handle particulates, take a look at MacroPac.

MacroCrack - look at crack propagation in viscoelastic materials. MacroCrack's been tested for materials like aspirin, microcrystalline cellulose, and for pigment-filled tablet film coatings. If you need to understand the fracture conditions in your material, MacroCrack's simple algorithm provides a great starting point.