ANSA Pre-processor

ANSA is a computer-aided engineering tool for Finite Element Analysis and CFD Analysis widely used in the automotive industry. It is developed by BETA CAE Systems. 
The software is distributed world wide by a number of BETA CAE Systems subsidiaries and business agents.
In the United States, it is distributed by Beta CAE Systems, USA, based in Farmington Hills, Michigan.
ANSA maintains the association between CAD geometry and the FE mesh. This means that the FE meshes are better representations of their geometric parents. Also it is easy to maintain and update any changes in the geometry by simply reworking the updated area instead of recreating the FE from scratch.
It carries several proprietary algorithms for meshing suitable for both CFD and structural models.
ANSA was initially standing for 'Automatic net generation for structural analysis', but the software has gone beyond that very quickly.