Here are two unrelated pairs of papercraft dice with skulls. The red pair on top are the Oogie Boogie's dice. Oogie Boogie is a villian from the 1993 Disney movie, The Nightmare Before Christmas. Oogie also is a reoccurring character in the Kingdom Hearts video game series.
The black pair of dice are a weapon called "Demon Dice" from the video game American McGee's Alice. When these dice are cast in the game a demon is summoned who then attacks your enemy.
The Oogie Boogie Dice are by Robert Nava, USA, 2008 and can be found here. The Demon Dice are by Rick the Webdude, USA, 2007 and can be found here.