Dvorak is a card game where all of the cards start out blank; players choose a theme, make up enough cards to get started, shuffle and deal, then add further cards to the game as the game progresses. It provides you with enough rules to start a game, but leaves the theme and the depth up to you.
You can use it as a skeleton for making a solid and standalone card game, you can play it as an experimental or cut-throat Nomic, you can use it to kill half an hour drawing silly pictures and forcing your friends to make drinks, you can throw together an amusing card game based on your favourite film or sport or in-joke—it's blank cardboard, it's fairly multipurpose.
“Dvorak—A Nomic Card Game [1]”
Sounds a lot like 1000 Blank White Cards [2] only there is a structure and the decks [3] have a more coherent theme to them than your typical 1000 Blank White Card deck (SEATTLE ELECTRIC GRIMMELDECK) [4] (well, as “typical” as a 1000 Blank White Card deck can ever be), but like all Nomic [5] based games, the rules are fluid enough to change—if you so want.
The Time Cube Deck [6] looks fun, although it won't make much since unless you read the site it's based on (NATURE'S HARMONIC SIMULTANEOUS 4-DAY TIME CUBE) [7] (warning: Crank Dot Net [8] labels that site as “illucid [9]”—and for good reason!).
[1] http://www.dvorakgame.co.uk/
[3] http://www.dvorakgame.co.uk/decklist.cgi
[4] http://www.virelai.net/cards/
[6] http://www.dvorakgame.co.uk/cardlist.cgi?timecube