em3d is a very fast tool for geophysical electromagnetic modeling, such as Transient Electromagnetic Method, Controlled-source Electromagnetics, Magnetotellurics, etc.
em3d has a unique graphic user interface (GUI) with GiD for geometry and data definition, mesh generation, and post-processing of the analysis results.
em3d has a powerful calculation capacity with modern/Independently developed algorithms. For example, an optimized and specially designed BEDS-FDTD algorithm involves GPU-supported acceleration help to obtain a very fast computation efficiency for transient electromagnetic forward modeling.
More features and functions can be found at https://em3d.cn/