How to send a message without the person knowing it's me?

I want to send a message to someone but I don't want them to know its from me, I was thinking of using my iPod with a new iMessage account but will it come up under my saved number in there phone because they are linked to the same iTunes account also I don't think they have an iPhone so if there's some app that can do this will it work on there phone?

There are tons of free texting apps that you can use on an iphone, ipod, android phone, tablet, or just use a website on the internet… If you use one of these it will give you a random number so they will have no clue who is really sending the message. Or you can try creating a fake email or facebook account.