Doublesix Dice are dodecahedron dice that have 1-6 on them twice that are supposedly better at rolling and balance than traditional d6. They’ve got a campaign going now on Kickstarter to fund them.
From the campaign:
By making the d6 a dodecahedron, the die will not only roll better, but be more weight-balanced as opposing sides have the same number of engraved pips.
Doublesix Dice can also be the perfect gateway accessory: Swap in your Doublesixes for the stale dice in your non-gamer friends’ games (like Monopoly and Backgammon), and soon they will be wanting to take on Advanced D&D.