[mac40k]

I used an earlier version of Calculatem when I first started playing online. It gives you the percentage chance of making the range of hands based on your holdings and the collective percentage chance your opponents have of making them. So if you have a pocket pair you're 100% to have a pair by the river, whatever to make a set and so on. I found it useful initially, but after a bit awhile you start to figure the odds in your head and I didn't want to pay to upgrade to Pro, so I haven't used the newest version.