Hello,
my name is Alan and i created a raid planner web application for guilds :
www.allgenda.com
I just adapted it for TESO, and a friend of mine did a dedicated skin for the game. (you can change the skin by clicking on the picture in the upper right corner)
Feel free to use it to manage your game events. And do not hesitate to ask me if you need help to set it up.
Alan