Stixy

http://www.stixy.com/

Stixy is site where you sing in and you can make a plan for whatever you want.

Somethings I like:
1: You can put in dpcuments so if you're having a proyect you can put it in no having to copy paste. and the you can export out when ever you want.
2:Also I like that you can put the calendar and put details so if you're planning a party or anything like it, this site is great for planning it.
3: The best part is that you can put photos so if you can show how it should look.

Thing I don't like:
1 The site doesnt have a video or anything at the beggening so you have by yourself
2 It doesn't allow you to put videos

Two ways you can use the tool;

Party planning
Project