GNU FisicaLab vs SimFlow

GNU FisicaLab is a free desktop application for solving physics problems while handling the mathematical details. Its modules cover two-dimensional particle and circular kinematics, statics and dynamics, calorimetry, ideal gases, expansion, and thermodynamics. Statics and dynamics problems are described by constructing free-body diagrams. The interface supports SI and English unit systems. A grid chalkboard starts at 26 by 18 cells and can be enlarged in Preferences to 100 by 100. Data fields accept scientific notation, conversion factors, arithmetic, trigonometric functions, and square roots; parentheses cannot group operations. Online and downloadable documentation includes step-by-step examples. Source code is available from GNU FTP and mirrors, with previous Linux binaries and a Windows installer listed. GNU/Linux and BSD executable packages may come from distributions. FisicaLab is distributed under GNU GPL version 3 or any later version and provides no 3D visuals.

SimFlow is desktop software for computational fluid dynamics, covering the workflow from mesh generation through post-processing. Simulations stay on the user's hardware, and the software runs on Windows, Linux, and macOS, including Apple Silicon. Jobs can run on a local cluster, remote server, or cloud, with HPC-grade parallel computing and no per-core or hourly charges. The full simulation engine is included in every plan. CAD imports include STL, STEP, IGES, OBJ, and BRep; results can be exported in VTK, Fluent, Tecplot, and Ensight formats. SimFlow integrates with ParaView, OpenFOAM, Docker, and Windows Subsystem for Linux. The free plan has no signup, credit-card requirement, or time limit, but is limited to 200,000 mesh nodes and one CPU. Professional costs €8,000 per year; Enterprise costs €10,000 per year. Commercial plans include a 30-day trial. Perpetual licenses are also available, with one year of maintenance and optional yearly renewals.