GPL or BSD license :)<p>But seriously, if you don't want to make it open source you should at least mention what kind of application it is, what amount of protection do you seek, is it paid or freely available etc. Give use a bit more background.
Most people don't read licenses.<p>I really don't think you need a huge legal document, just a short paragraph or a few bullet points to assert your IP and prevent "unauthorized" copies.
I'm fond of the Apache License for open source stuff because it grants users the four freedoms without the viral nature of the GPL.<p>For proprietary work, my employer has always outsourced writing the license agreement to our legal team. Looks like you might have to spend some money.