Easy Assign is a World of Warcaft Addon that allows raid leaders to quickly assign players to customizable tasks and then print these assignments into chat.

How do I use it?

Click on the blue icon by the mini map or type "/ea" to open the interface.
Your raid members should be populated in the player bank, if not press "Refresh".
Add or delete groups as necessary. A maximum of 8 groups can be created.
Edit the headers to suit your needs. Headers can consist of custom text or you can drag a player label into it.
Drag people into the appropriate groups. Note that order is preserved and this may be useful in some cases.
Once the assignments look good, press "Print" to print out the assignments.
To clear everything, press "Reset".
Setups can be saved for later use. Note that when you load a saved setup, you should refresh things since some players may not be present this time around. To delete a saved setup, right-click on the listing in the Saved Setup window to bring up the delete menu.

What kind of assignments can I use it for?

Tanks to mobs with particular raid symbols
Healers to particular tanks
Interrupters to particular targets
Players to crowd control particular targets
People to go to particular spots

Tips

You can specify the channel where you want to dump the assignments, like "raid", "party", "say" or "myhealchannel". Note that you must be in that channel to do so.
Save your setup for each situation, then for the next raid you can simply reload them and update the players if necessary.
Player names can be dragged into the header labels.
Shapes can be assigned by typing the shape text (ex. {Skull}, {Cross}, {Square}, etc.) into the header label.