CAD / CAM software

[uid313]

Does anyone know of any good CAD / CAM software for Linux?

I would like something like this;
* http://upload.wikimedia.org/wikipedia/commons/5/59/Planar_core_assembly_exploded.png
* http://upload.wikimedia.org/wikipedia/commons/0/0c/Capacitor.svg
* http://upload.wikimedia.org/wikipedia/commons/1/17/ER_core_assembly.png
* http://upload.wikimedia.org/wikipedia/commons/2/26/RM_core.png
Maybe...

Or perhaps do something like this;
* http://officeblogs.net/visio/CAD-2-072506.png