One tool that Geometry team want to use in the classroom this year is blogger. We want to create a blog for our classes where we can post what we did in class each day. That way if a student is missing they can see what we did or if they have a question they can post the comment to the blog and we will respond. With so many kids having smartphones it makes it easy for them to look up information.
I also created an acount in Diigo an Skype, but I am not sure if ever use it in my classroom.