charts

sheetsee.js

"Sheetsee.js is a JavaScript library, or box of goodies, if you will, that makes it easy to use a Google Spreadsheet as the database feeding the tables, charts and maps on a website. Once set up, any changes to the spreadsheet will be auto-saved by Google and be live on your site when a visitor refreshes the page.
Using Google Spreadsheets as the backend database is awesome because it is easy to use, share and collaborate with." -- website