WowAce

You already have Outline and ThickOutline but how about Shadow()?

Here is my suggested addition to Lua Text:

local function Shadow(offset)
	local font_string = ScriptEnv.font_string
	font_string:SetShadowColor(0,0,0,1)
	if type(offset) == "number" and offset > 0 then
		font_string:SetShadowOffset(math.abs(offset),(math.abs(offset) * -1))
	else
		font_string:SetShadowOffset(1,-1)
	end
end
ScriptEnv.Shadow = Shadow

Now I have  the offset Y to always be negative (possible pointless added safety check to make sure user doesn't put in a negative number by accident) as well as the offset X to always be positive (same reason if a user puts a negative number). If the user puts in no number it should default to a shadow offset of 1 and if the user puts in 0 it also should default to 1

I don't have any user input option for the SetShadowColor settings to keep it looking like a shadow and clean.

To use this would be the same as using Outline in a luatext

Shadow(2) would set a shadow with an offset of 2 for x and -2 for y

Blown up and lightened to make it readable example using Shadow(2) on name, health, power, and class lua texts

Here is what Shadow() (which is an offset of 1) looks like

Oh and while font_string:SetShadowColor(0,0,0,1) can technically be omitted, doing so makes the shadow far too dark. Adding that it gives it a nice shadow effect instead of a harder near black color.

I also did not put options for individual control over the x and y offset because it just looks odd if you don't have them uniform (at least to me, could add that easily).