I've tried a bunch of different programs but seem to get different results on subwoofer enclosures. What is everyone here using?
I tried Blaubox, Perfect Box and WinISD and get different results with each one.

I used WinISD for my box and it work very well for me. I haven't tried the others that you listed though.

Bass box pro 6 and Termpak

Well I had termpak for about a week until the computer went down and one of the idiots i used to work with lost the security dongle so i really didnt get to use it much. I still have the original software but they want $300 for the security dongle which kinda pisses me off.

Using Bass Box Pro here and it works great!!!!