Dice in JavaScript with an (aprox.) 49.7%-50.3% distribution.

dice.js

function dice()
{
	var seed = Date.now() * 11 ^ ~31;
	var a = seed << 8;
	var b = seed << 16;
	var c = seed << 32;
	var d = seed << 64;
	a = a ^ b;
	b = b ^ c;
	c = c ^ d;
	d = d ^ a;
	return Math.abs((a | d << 11 | c | b >> 21) % 2);
}

try
{
	module.exports = dice;
} catch
{
	/* ... */
}