im looking for something that can detect enemies that are in sigile status so rouges dont blast half of ur health with one hit, so please try to make an addon like this and call me if u are able to make it

http://wow.curse.com/downloads/wow-addons/details/stealth-alerter.aspx might work.

http://wow.curse.com/downloads/wow-addons/details/aware.aspx is another possibility.

http://wow.curse.com/downloads/wow-addons/details/spy.aspx seems promising.

Just look at the pvp section on curse.. mouse over the names and try to find what you want. I am sure at least one will fit your needs.