What are some alternatives?
When comparing ANSYS Mechanical and RISA-3D, you can also consider the following products
midas GTS NX - GTS NX is a next generation geotechnical analysis software that features the newest development in cutting-edge computer graphics and analysis technology.
RISA-2D - Structural Analysis and Design
Abaqus Unified FEA - Finite Element, Multiphysics, and Simulation Software
SAP2000 - The SAP name has been synonymous with state-of-the-art analytical methods since its introduction...
midas Civil - Structural Analysis and Design
PLAXIS 3D - PLAXIS - Essential for geotechnical professionals. 2D & 3D finite element software for geotechnical analysis of deformation and stability of soil structures