Sometimes I wish I had paid attention in math class, but then again in this interwebs age of information it seems like it don't matter none since everything is just a well worded search away.
I wanted to look at the probabilities of obtaining certain results on tables I was putting together and, sure enough, I found a great free utility that let me do just that: Small Roller will let you lay down the types of die rolls you want to do, lets you roll them and also offers up a nice graph plus percentages for obtaining any result or range of results.
Understanding Probabilities When Playing Dice Games is a useful little article on statistics with some handy tables based on six-sided dice used as examples.

