FENDAC: A Multi-Purpose Finite Element Code
FENDAC is a research finite element program for usage in analysis and design of both structural systems and composite materials. Special features include: linear and nonlinear analysis capabilities; a variety of material models; basic and advanced topology optimization capabilities; homogenization capabilities; porous medium capabilities; a wide range of efficient equation solvers.
BESTOP: Structural Topology Optimization Software
BESTOP is a software package that integrates an optimization driver program, and commercial structural analysis programs (presently, NASTRAN) to perform structural topology optimization.