Handsontable is a lightweight (60kb unminified) jquery plugin for creating an Excel-like table editor in HTML. There are plenty of useful options like autoexpanding, legend, autocomplete, scroll, drag-down, context menu and etc.
Demo : http://warpech.github.com/jquery-handsontable
Download : https://github.com/warpech/jquery-handsontable
License : MIT License
