SilicaCAD2021 is the Real economic CAD software, It is compatible 2D/3D ACAD application, SilicaCAD works with AutoCAD® DWG files from v. 2.5 to v. 2021. SilicaCAD can imports Autodesk Revit® and IFC files. SilicaCAD It is The best economic solution for all you need in AEC, MCAD, and all of generic CAD usages in all sectors.