This thread is where you can find all the really useful reference links gathered together in one place. I will add to it as and when I can find them or they get posted. If you have a thread or link you think should be included please PM me.
Please don't ask for a thread or link to be added just because there happens to be a nice photo in it, this is a reference thread where you can get information on specific items quickly. If you don't see what you want here, there is always the 'Search' button to use anytime you need it.
NSDAP Goldenes Parteiabzeichen
Ehrenkreuz des Weltkriegs 1914/1918 (Hindenburg Cross)
Lorenzo Brown's homepage - a good reference site for Combat badges from the Heer, Kriegsmarine and Luftwaffe with many variants and most makers covered.
C E Juncker A website created by a collector and covering the history of the Juncker company from Berlin.
RZM Makers Code List
Adolf Hitler and Third Reich media
Eisernes Kreuz 1st Klasse reference site
Classification of Minesweeper Badges based on obverse design
Ribbonbar Identification Guide
Medalbar/Ribbonbar medal mounting order
A Collectors Guide to Third Reich Awards
Medal Ribbon Identification.