NEiNastran Engine 10.0 was available as a free download on our software library. Editor.exe is the default file name to indicate the NEiNastran Engine installer. The software lies within Photo & Graphics Tools, more precisely 3D Design. The most popular versions among NEiNastran Engine users are 10.0, 9.2 and 9.1. This software is a product of Noran Engineering, Inc.
From the developer:
Finite Element Analysis of a robotic arm using the NEi Nastran EngineThe NEi Nastran Engine is a powerful, general purpose Finite Element Analysis solver used to analyze linear and nonlinear stress, dynamics, and heat transfer characteristics of structures and mechanical components.
You may want to check out more software, such as Engineering Power Tools, Engineering Power Tools Plus Edition or FRED Optical Engineering Software, which might be similar to NEiNastran Engine.