Pidro Challenge - Provides a download, rules, FAQ, and users manual. [Windows] - http://www.pidrochallenge.com/
Nate's Kentucky Rook - Game played with a trick deck against computer opponents. Contains a download and forums. - http://webpages.charter.net/nebsoftware/
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/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
Mystic Island - Spades, Euchre, Hearts and Pinochle online games and multi-player tournament. Free download and play. - http://www.mysticisland.net/
Shithead - Java version can be played single or multiplayer. - http://home.pacific.net.au/~cavenagh/SH/
Kvitlech 2000 - Download an offline version of the game. - http://www.gvaldig.addr.com/kvitlech/
FreeDoko - Windows or Linux game similar to Skat for four or more players. - http://free-doko.sourceforge.net/en/
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/
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/
Spi Poker - Play Holdem, Omaha, and Seven Card Stud against other players on the internet. - http://spi-poker.sourceforge.net/
Gnupitch - Linux console version of Pitch - http://www.ccs.neu.edu/home/maitre/gnupitch/
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
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