No, there is no open source application of such kind. I have searched for some, but no results were found. However, there are applications available to convert the data from AutoCAD To Google Earth. However, since the selection is too broad, you need to visit Google Search to obtain the applications. For example, you can use Expertgps's DXF to KML application to convert the data or the features from GISConvert. They're websites and services available on the first page of the results list.