ETH password/bruteforce

Hello, bought eth during the pre-sale but choosed a "strong" password. The problem is that it's so strong that i've forgotten some parts of it myself. I do know what the password is, but i don't know wich letters that are capital.

I know the amount of letters, wich letters,numbers and symbols that are in there, but im wondering if there is a way to "brute-force" and let the computer try different combinations (by switching from capital to non-capital etc) with. Any existing program for this?

If it's not possible, then it's not really a big deal. Still got some eth but would be nice to get the other ones aswell.