Makos’s ContentHelper (1.1.0)

This addon gives you option to:
– share markers with your group
– give raid warning to your group (as a leader)
– trigger countdown (useful for tanks pulling mobs)

For placing markers, simply keybind the marker placement or type /mplaceself or /mplacetarget to place marker on your position or on position where you are currently looking.
To customize the marker you are sending to your group use GUI.

For raid warning type /mrw yourmessage (maximum 15 characters). You have to be group leader to use this feature

For countdown type /mcd 10 (or any amount between 3-25)

You can also keybind all these feature in game controls.