Desktop Timer with Message you Can Change

I want a desktime timer that people can download. It should be able to count up or count down. Also, the user should be able to type in a display message that can be changed at anytime. It would stay on top of all other windows that were open... and could be drug to where they want it on the screen. I don't know what someone would use to program this so I just picked five things under websites, it, and software. Hope that worked. Paula S :)