Licenses for free software

[indiocolifa]

I'm actually developing an application which is intended to be free to download, copy, share, use,etc. but I do not want, until it's somewhat pulished, to release the source code.

Which public license should I apply to my application?

Thank you very much.

[dimm_coder]

Here the list (with description) of various license types:
http://freshmeat.net/faq/view/48/