Need a Crypter

I have a program I am making almost complete. It has taken me forever to make it and it is now perfect. I want to hide the source using a crypter, but I need the crypter to still allow the program to run correctly/exactly. Does anyone know where I can get a good free one or is there some on this site?

I went through a few crappy, expensive crypters last year. Just learn to make your own.