PokerTracker

Sorry if this is mentioned somewhere. I looked but could not find. If I buy Omaha Pokertracker do I get the holdem (and/or stud) version as well? Or will I have to buy that separately?

They are separate programs but you get a discount if you buy them together:
http://www.pokertracker.com/products/PTH/purchase.php

Thanks. I checked out the page, seems it's a 10$ discount (for two) regardless of whether you buy them at the same time or not? Is that correct?

Correct.