Using the following four spreadsheet gadgets, you can display information in unique ways. To get started, you can either use their templates as they already have the gadget inserted within the spreadsheet. Or add these gadgets using Insert > Gadgets.
1. Tree Map Gadget is a color-coded area diagram that helps you understand complicated hierarchical data at a glance.
2. Advanced Word Cloud Gadget helps you visualize the popularity of words from large amounts of text, say for example a feedback form, where the more often used words appear in a larger font.
3. Spider Chart Gadget lets you visually compare the values of multiple attributes.
4. With QR Code Gadget, you can encode data into the QR code format from a Google Docs spreadsheet so that it can be scanned and read by mobile devices that have a QR code reader.
More info: Google Apps blog