RealCADD is a CAD drawing program that allows you to draw, move, edit, modify lines, rectangles, ovals, text, arcs, polygons, and free lines. It also supporting filling and hatching of the shapes.
RealCADD is available in 2 versions, Standard ($95) and Professional ($135, Pro version only for Mac OS X). In Pro version, RealCADD can read and write DWG files from V12 to 2005.
If you're looking for a true vector based Computer Assisted Drawing program that's reasonably priced... Then RealCADD is made for you. RealCADD works like "MacDraw" but with many more possibilities of which reading and writing DXF files and the importation of images in the drawings.