Arkance Systems (formerly known as CAD Studio, est. 1991, www.cadstudio.cz), is an Autodesk Platinum Partner, Training Center and Authorized Developer based in the Czech Republic. We offer hundreds of free add-on tools for AutoCAD, Inventor, Revit, AutoCAD Civil 3D and Plant 3D, Vault, Fusion 360 and GIS applications. These tools plus thousands of CAD and BIM blocks and symbols are available for download through our portal CAD Forum at www.cadforum.cz.