EditGrid, the online spreadsheet creation tool, has released a new feature called Dynamic Image.
With Dynamic Image, you can use your data to create mash-up images for comparison purposes. This works in a similar manner to Statsaholic, which has input boxes for domain names and creates a traffic ranking comparison chart from Alexa data. EditGrid's Dynamic Image tool lets you create your own "-aholic" graph for your own purposes. You'll need to be familiar with spreadsheet creation in order to utilize Dynamic Image to the best of its capabilities. This kind of tool releases you from needing software, or just a lot of time on your hands, and offers a free way to pump out some pretty powerful data.
Google has added some updates to its own spreadsheet service, while appaholic is another mashup tool.