This is an elementary site with some uses for everyone. It lets you make word clouds that are easy to print. There are games for the different grade levels, K-5. These are all free.
TypeWith.me
The title says it all. You click on the link to create a document and then invite others to type on the same page with you. Each person is color coded so the others can tell who typed which part. Great for using with collaborative groups. It is easy to tell if everyone is doing their part of the project. So simple to use!
Thinkfinity
I can't think of a better site to begin our "Tech Treats." This site consists of nine partner sites developed by some well-respected educational organizations. Each site includes standards-based lesson plans, student activities and reviewed websites.