Droptables is the only table manager for Joomla that offers a real spreadsheet interface to manage tables in Joomla. Plus, everything is manageable directly from your editor. One click table themes, table and cell copy, some calculation functions and auto generated charts are part of the tool. As Droptables is fully managed from your editor, it works in the same way both frontend and backend. An advanced Import/Export in Excel format is available. Usually tables require HTML/CSS knowledge, this is no longer the case, this extension is really easy for beginners.
Droptables v3.5.8 - Joomla Table Manager - JoomUnited