HeeksCAD is not finished, yet.
HeeksCAD is a free, open source, CAD application written by me, Dan Heeks, email@example.com Anyone can download it from http://code.google.com/p/heekscad/
Functionality: Import solid models from STEP and IGES files. Draw construction geometry and lines and arcs. Create new primitive solids, or make solids by extruding a sketch or by making a lofted solid between sketches. Modify solids using blending, or boolean operations. Save IGES, STEP and STL. Printer plot the 2D geometry or to HPGL. Import and export dxf files; lines, arcs, ellipses, splines and polylines are supported. Use the geometric constraints solver to create accurate drawings from rough sketches.
See here for instruction how to use HeeksCAD http://code.google.com/p/heekscad/wiki/UsingHe
These details are provided for information only. No information here is legal advice and should not be used as such.