Download of WindStation 4.0.5 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among the program users are 4.0, 3.0 and 2.0.
We recommend checking the downloaded files with any free antivirus. This software is an intellectual property of Antonio M. Gameiro Lopes. WindStation.exe is the most frequent filename for this program's installer. WindStation is included in Education Tools.
From the developer:
WindStation is a program that allows you to perform numerical calculations of wind flows and heat transfers over complex topography and around bluff obstacles. It is a diagnostic simulator that solves the full 3D Navier-Stokes equations, including turbulence and thermal effects, using a boundary-fitted coordinate system.
You may want to check out more software, such as Avantage BPM Foundation, Adding Machine or gitoolbox, which might be related to WindStation.