ABAQUSWith Abaqus/CAE you can quickly and efficiently create, edit, monitor, diagnose, and visualize advanced Abaqus analyses. The intuitive interface integrates modeling, analysis, job management, and results visualization in a consistent, easy-to-use environment that is simple to learn for new users, yet highly productive for experienced users. Abaqus/CAE supports familiar interactive computer-aided engineering concepts such as feature-based, parametric modeling, interactive and scripted operation, and GUI customization. I have released Open VOGEL a couple of years a go as GPL3 free open source software. It is based in potential flow theory, so it is not in the same level as a FEM-base program. However, it does present some interesting features, and you might find it useful for solving problems like the interaction between surfaces and fuselages, and static aero-elasticity.I have never used Tornado, but I believe from what I have read in their specifications that Open VOGEL is more complete (and I am not trying to sell anything). It also runs in windows as standalone, you don't need any special supporting framework behind (like Matlab).So when it comes to free software, if I was you I would definitely give it a try.
Most of other comparable rivals are proprietary software, and not cheap at all.Just google Open VOGEL and you'll find it.
Virtual Wind Tunnel Software Free
Capabilities Pre-processing. Meshing.
Online Wind Tunnel
Predefined mesh settings available, coarse/medium/fine. User defined volume refinement zones, also for individual parts. User defined Boundary Layer (BL) parameters, globally or on part basis.