Hearts for KDE - A game of hearts. - http://hearts.luispedro.org/
Megami - A Blackjack game for KDE. News, screenshot, downloads. - http://www.hakubi.us/megami/
kbigtwo - A KDE application that plays the card game of 'cho dai di' or simply 'dai di', which is extremely popular among chinese in Malaysia/Singapore. - http://sourceforge.net/projects/kbigtwo/
KPoker - Play a round of Poker. - http://kpoker.sourceforge.net/
Lieutnant sKat and Four wins - Two games: A two player cardgame according to the rules of the German Offiziersskat and the classic four in a row game. - http://www.heni-online.de/linux/linux.html