oomfo is a free add-in for Microsoft PowerPoint that lets you incorporate stunning, interactive, animated charts and graphs into your PowerPoint presentation.
It's very easy to install and use and it only takes a few steps to insert a chart. Charts can be sliced, rotated, and turned into 3D charts. You import your data from a spreadsheet and then create the chart exactly how you want it.
This is a great, free add on that can make data more interesting and easy to understand and visualize.
Chartle - free simple and interactive charts online
Using PowerPoint for Unit and Lesson organization