MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
You mistyped, I suppose you mean DraftSight http://www.3ds.com/products-services/draftsight-cad-software/free-download/
It has a linux version, so I could try it. Is it only 30 day free trial or can you keep using basic features?
I'm using Inkscape normally, happy about it, the uploaded ascii dxf opens now. Convert to svg can be tricky, you need to avoid scaling. I'll lasercut some!