Call for action. Building CAD/CAM/CAE development resource index
Blog post at http://opencascade.blogspot.com/2009/01/call-for-action-building-cadcamcae.html

I set up a wiki at http://cadcamcae.wikia.com/ - feel free to add CAD/CAM/CAE information to it.

There is been some attempts to do it already

http://wiki.xtronics.com/index.php/CAD_CAM#Linux_friendly_CAD_CAM_packages

http://www.editthis.info/opencam/Main_Page