G-Code Generators for us poor people.

Hi

I have a mill running an ECM (linux) system and it works great.

What I am look for is low-cost G-code generator that feed with DXF's
and it will generate the proper G-codes.

I have look all over the web and have found many that will simply convert
my dxf's to G-code but I need something that will take cutter size and generate
an actual tool-path not just g-code for the perimeters.

I would also like it to generate the "Pocket" g-code for milling out cavities.

Any ideas ???

My application is not for production, just my hobbies related parts.
I don't mind if its interactive and requires manual selection and alike.

Thanks
Mark Thompson