I found this free coaching software on the English FA website. It's a drill/tactics planner and allows you to make some simple animations. You can save the files so can presumably email them to other coaches or your players too.

It's very simple to use. I worked out to create an animation of a simple attacking movement in a couple of minutes.

http://www.thefa.com/coachtool/

The guidebook is:

http://www.thefa.com/coachtool/userGuide.pdf