About execryptor I found this one:
> I tried more than listed below protections. The strongest most
> proof most flexible from this list is really EXECryptor form
>
http://www.strongbit.com/. It is not only the mine opinion. Most
> software vendors agree > with me. The only thing I cannot
> understand is the absence of reviews of EXECryptor in developer
> press, nor > blogs/white papers. However it has very good opinions
> in different programmer's disscussion. I can assume > it is one
> one things that "its quality sells itself". The other "cons" is
> EXECryptor does not support .NET platform working only for win32
> exe's; dll's and othe PE's and only Windows compatible. However for
> cross-> platform apps licensing there is HardKey License Manager
> (as well from strogbit.com ). It has less 'bullet-
> proof' antireverse/anticrack but more advanced and flexible
> licensing features (however remains unbroken as well as
> EXECryptor). So if smb. really needs to solve cracks/piracy
> problem StrongBit really will DO. By the way as for .NET
> protection (the original thread subject) Strongbit partners with
> dotnet protector author 9Rays and they follozing their press
> release they are planning to create universal app security. I'm
> sure it is the only one protection that warrant attention of people
> looking for commercial program anticrack security tools.
> Regards
> Mad
> EXECryptor user
As for me I'm trying execryptor now... What I can say... Another vote for it
Also there is hot discussion generally about piracy and protection on
http://discuss.joelonsoftware.com/default.asp?design.4.354142.23