WP Table Manager WordPress Table Editor Plugin GPL Overview:
WP Table Manager is the only WordPress table plugin that offers a full spreadsheet interface to manage tables. Create a table, pick up a theme and start editing tables right away.
You’ll enjoy a set of powerful table edition tools, such as HTML cell editing, table copying, calculation, Excel, Google Sheets, and Office 365 synchronization. As an end-user, editing a table is as simple as clicking on a cell, and editing data with or without a visual text editor.