I was wandering if there was a way to make a addon like the click heal addons but when u click on the mobs pic it would shoot a spell of your choice

would be nice for party's/raids so you can allways hit what the tank is targeting with out having to sort throu all the trash or take the time to hit the F key

/assist TANKSNAME will target what the tank is targeting. just make it a macro and slap it on your bar.

yea I know but I was hoping there was an addon like the quick heal but instead of healing does a spell to the target...

You can do that using the ingame macro function...

Your macro would look like this:

/assist
/useskill (Frostbolt )

To get skills into a macro, shift-click them from your spellbook while the macro UI is open.