Hi Alessandro ;
A good point about the Cirtix alternative. The only major flaw with products like that is that they do not allow you low level device control like Appeon Web and Appeon Mobile does. So as long as you just want a no device interaction application - then that is a good alternative.
Other bonuses for Appeon though are:
1) 64 bit ready
2) Does not use the PBVM
3) Makes your application multi-threaded
4) n-tier ready
5) fail-over
6) load balancing
etc
Regards ... Chris