(reporting with [EE] tag):

...claims to be the most full-featured of free PCB design tools.  No 
limitations, can export gerbers, import Eagle libraries & designs:

http://www.designspark.com/

part of a "design portal" type place with reviews of development kits, 
other free tools, etc.

Windows only.

more info:
http://www.embedded.com/products/softwaretools/225702304

If anyone gives it a try... please post your impressions.

Cheers,
J
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