Links: Bitmaps, fonts, programming tools
Oliver Xymoron has drawn some excellent GIFs of international playing-cards which I have used for illustration in some places.
The Pysol site has a large library of playing-card images
Gyula Zsigri has created a True Type Font for Windows, containing suit symbols (French, German, Latin and Swiss) and other playing-card related glyphs.
Quivira is a free Unicode font with symbols for German, Swiss and Spanish suits, Jokers and Mah Jong in Private Use Area E000-E00E.
Bermuda Card & Bridge Fonts and other game fonts from Alpine Fonts.
Ryan Neaveill's free Playing Cards font at DaFONT
Perry Mason's 52PlayingCards font (download 0-9.rar)
Mike Hind's free Magic: The Gathering font at Fontz.ch
Neale Davidson's free Magic Cards font at Fonts4Free
Hans Bodlaender's True Type Chess Fonts page
Luc Devroye's links to Playing card fonts and Chess fonts