Free Spades  
   Free Spades, Hearts and Euchre games.
   http://www.freespades.com/

AS Spider  
   Windows game that can use any jpg or bmp picture as the background for the deck.
   http://www.phnet.fi/public/aki.suuronen/Games/Games.html

Dr. WuWu's Catch 24  
   Windows game where the aim is make twenty-four using four cards through addition, multiplication, subtraction, and division.
   http://www.drwuwu.com/catch24.html

Gnupitch  
   Linux console version of Pitch
   http://www.ccs.neu.edu/home/maitre/gnupitch/

Spi Poker  
   Play Holdem, Omaha, and Seven Card Stud against other players on the internet.
   http://spi-poker.sourceforge.net/

Mah-Jong  
   An open source version of the classical Chinese game for Unix or Windows, including network play and computer opponents.
   http://www.stevens-bradfield.com/MahJong/

Stackomania  
   Win by putting a stack of cards in order from lowest to highest. Play against a computer or a human opponent.
   http://www.geocities.com/stackomania/

Cards Heaven  
   Several free Windows downloads.
   http://www.pipemedia.net/reeve/

Scout's Game  
   An easy to learn game for Windows which can be played against the computer or against up to three other players over the internet.
   http://rockxware.dse.nl/scout/

FreeDoko  
   Windows or Linux game similar to Skat for four or more players.
   http://free-doko.sourceforge.net/en/

Kvitlech 2000  
   Download an offline version of the game.
   http://www.gvaldig.addr.com/kvitlech/

Network SpeedCard  
   Windows freeware to be played on two connected PCs.
   http://www.ozemail.com/~eungyung/nsc/

Concentration  
   Windows card matching game for two players.
   http://members.rogers.com/concentration/

Pokermi  
   Download free poker game to play against your computer or others over the Internet.
   http://uk.geocities.com/kamal_bahrin/

Rogueware  
   Versions of poker and blackjack.
   http://rogueware.8m.net/

Internet President  
   Free version of President.
   http://www.esuna.co.jp/chocobon/en/

Shithead  
   Java version can be played single or multiplayer.
   http://home.pacific.net.au/~cavenagh/SH/

Uproar  
   Bridge, Euchre, Gin, Hearts, Pinochle and Spades. Free downloads and play sites.
   http://www.uproar.com/games/games.asp?category=cards

Mystic Island  
   Spades, Euchre, Hearts and Pinochle online games and multi-player tournament. Free download and play.
   http://www.mysticisland.net/

Thanos Cardgames  
   Over twenty downloadable card games.
   http://www.geocities.com/thanoscardgames/

MathWar  
   A War variation for Linux in which you must multiply the values on the cards in able to be able to take the trick.
   http://webpages.charter.net/stuffle/linux/mathwar/MathWar.html

Cribbage Squares  
   Score as many points as possible by creating eight cribbage hands in a 4x4 grid. (Windows)
   http://www.gamesbymax.com/cribsqrs.html