We can always use more CAD applications in the linux world. I have used QCad for basic mechanical schematic drawing, but had a look around to see what else is out there. For people looking for a basic 2D and 3D CAD application (primarily architecural design), check this out:
CYCAS CAD 2D + 3D + ARCHITECTURE
They have an rpm package available for download. I thought someone might find it useful. 
i opened a thread some week ago,maybe here you can find some information or link
CAD,CAM,CAE softwares installation - openSUSE Forums
i worked on cad for windows for years,if you need alternatives you can find something in the link …the only software that has a linux and a windows version is pro-engineer while if you want to run windows softwares on linux the only solution is Wine(i became crazy to do it)