Some very interesting tools listed that I've not aware of. One of my favorite is prezi. This tools allow you to create presentation through images and video. It's very useful in a classroom because students can create any kind of presentation individually or collaboratively and share by providing the given link. Here is something that I briefly put together about graphing linear functions.
Make Beliefs Comix is another useful tool for students to create mini project or a simple explanation of procedures in a classroom and email it to the teacher. It seems that this tool only allows the maximum of 4 panels, which is a positive thing. The restriction put students in a situation where they have to be precise to the point and not beating around the bush. I created a basic comic strip about solving equation.