Sheepshead Association  
   Free group offering game rules, glossary, history, and related resources, with tournament and open play news.
   http://www.sheepshead.org/

Sheepshead Page  
   Game history, rules, and tips.
   http://sheepshead.8m.com/

Sheepshead Home Page  
   The playing deck, rules, scoring, and strategy tips.
   http://www.geocities.com/Colosseum/Park/3508/trump.html

How to Play Sheepshead  
   Rules and strategy for the five-handed game variety.
   http://www.steve.blessing.com/sheepers.html

Schafskopf  
   Rules and strategy for the three-handed game variety.
   http://www.robreid.com/schafskopf/

Steiner's Sheepshead  
   A weekly tally of results from an ongoing Madison, Wisconsin game begun in 1996.
   http://my.execpc.com/~pauer/sheeps.html

Sheepshead Central  
   News, tournament updates, event photos, online polls and an active message board.
   http://groups.yahoo.com/group/sheepshead_central/

Sheepshead Optional Doublers  
   Optional ways of scoring.
   http://www.webspawner.com/users/sheepsheaddoubler/

The Rules of Skat  
   Scoring, bidding and special conventions.
   http://home.att.net/~elinker/skat.html

International Skat Players Association  
   Organizes tournaments and promotes the game worldwide, with local chapters in a dozen countries.
   http://www.ispaworld.org/

Schafkopf Group  
   The rules, tactics and variations for the Sheepshead/Skat/Doppelkopf/Schafkopf game family.
   http://www.pagat.com/schafk/