MUSEA:

The French Playing Card Museum in Issy-les-Moulinaux, a suburb of Paris (also see: "Events").
The German Playing Card Museum in Leinfelden-Echterdingen, close to Frankfurt.
The Belgian National Playing Card Museum in Turnhout.
A Spanish Playing Card Museum in Oropesa del Mar, about 80 km from Valencia.
The Elliot Avedon Museum & Archive of Games, part of the University of Waterloo, Canada.
The Jean Dieudonné Playing Cards Museum in the Kulturhuef in Grevenmacher, Luxembourg.

CLUBS:

IPCS, International Playing Card Society.
52+Joker, American  collectors club of old playing cards.
L'Accart, the French playing card collectors society.
Cartofilia Helvetica, the Swiss playing card collectors club.
EPCS, English Playing Card Society.
BEJC, Brussels Euro Joker Club, for joker collectors and playing card collectors.
Asescoin, the Spanish club of playing card collectors.
Asacon, the Argentine club of playing card collectors.
Talon, the Austrian Hungarian club of playing card collectors.
Bube - Dame - Koenig, the German club of playing card collectors.

COLLECTORS:

Peter Endebrock's site with extensive info on taxstamps from all over the world.
Alexander Sukhorukov's World Wide Web Playing Card Museum.
A Dutch joker collector's site with many links to other joker collectors.
Alta Carta, a Swiss founded trading site, supported by different collectors.

CARDMAKERS

HEARTS, a Dutch playing cards manufacturer.
COPAG, a Brazilian playing cards manufacturer.
PIATNIK from Vienna, Austria.
FRANCE-CARTES, a leading French manufacturer.
CARTA MUNDI, the world's largest manufacturer.
CIVERTAN, a manufacturer from Hungary.
FACE & DOS, a French publisher of playing cards.
The WORSHIPFUL COMPANY of Makers of Playing Cards

MISCELLANEOUS

The COLLECTORS WEEKLY, a US website for every kind of collector.

PRESS IN CASE OF NON-FUNCTIONING LINKS