The DualCAD project is an ongoing project "over 17 years" to create a freeware cad application that handles the basic needs of most microstation users. Currently DualCAD is aimed at the 2D user with perhaps rotated views , reference files, and hybrid raster files. DualCAD can be run under LINUX using WINE. For more advanced CAD needs please look at PcsCustom. DualCAD Review is for redlining only. Choose DualCAD review if you do not want your users editing the actual design file.