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Tuxguitar is basically open-source GuitarPro. It's not as packed as GuitarPro is, but it can do the basics just fine.
SuperiorDrummer is way too expensive for what I'm using it for haha

I use cakewalk as my daw and it has a drum replacer for wav, though I haven't tried using it before. I'm getting by fine on superior drummer 2 and my roland handsonic as a midi controller with midi snap in cakewalk. I'll give TuxGuitar a look, I tried GuitarPro but found it a bit too clunky to use to just play along with tabs I found on the internet.