Virtual Hypnotist is a free, open source, interactive hypnosis program, and is a rewrite of Hypnotizer 2000.
It includes features such as voice recognition, speech synthesis, subliminal messages, completely customizable scripts (featuring a unique scripting language), videos, audio, and lots more. Its purpose is to simulate a real hypnosis session as much as possible.
Just the job if you want to stop whatever you want to stop doing. It's free as well...
You are getting sleepy... snoooooooooooore
http://vhypno.sourceforge.net/