Hi All,
RS and FabLab London are hosting a workshop on 15th July which may be of interest to some, which will provide an introduction to the — not open source, but free-to-download — EDA and CAD tools, DesignSpark PCB and DesignSpark Mechanical.
http://www.eventbrite.co.uk/e/fab-lab-master-3d-cad-pcb-design-in-one-day-re...
Cheers,
Andrew