Great Design Guides

Came across this design guide for plastics. Clear and comprehensive. (updated link)

Other examples that peoples come across would be good to see.

link didnt work for me but managed to find via google, such a great guide

Bayer Material Science puts out the exact same guide (with their name on it) but you need to register on their site to get it.

A second guide by Bayer expands on the concepts behind snap fits for plastics.

A better, in my opinion, snap fit guide is circulated by BASF:
It has a corresponding snap fit calculator:

BASF also has a good molding guide:
Design Solutions/General Molding Guidelines:
and a cost calculator: