Meta Box Custom Table
MB Custom Table is an extension of Meta Box plugin that helps you to save data to custom table instead of the default post / user / term meta table. All meta values are saved in a single row, and each column will be a meta key. This reduces the number of rows in the database which can cause a performance issue when the data grows.
And let you have all of your data in one place, so you can easily view, edit, import, export it.