Nektra Spy Studio is now Freeware:http://www.nektra.co.../spystudio-purchase/
The company offers support packages as shown in the chart. I noticed it because it is featured on Shareware on Sale here: http://sharewareonsa...giveaway-coupon-sale
I don't understand it all yet. But it seems it can virtualize applications a la VMWare ThinApp and also do trace comparisons of program file, registry, api and COM calls, to aid in debugging/troubleshooting.
Looks interesting even if you don't have any applications to publish.
Edit: it has both 32 and 64 bit downloads.