Isn't that what Excel is for? Seriously... I worked for a company that was developing a web app for small businesses for their business processes, and its amazing (and appalling) how many small businesses use Excel spreadsheets for everything.

Even now I work on a product that manages data, and all the customers think a "data export" is a CSV file. I've run into some folks who think the app stores its data in "special spreadsheets"!

And frankly most small businesses don't care that Excel spreadsheets aren't all that great. They work well enough. The market has an education problem more than anything.