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.
Steve Smith's Bermuda Playing-Card & Bridge Fonts