Open Source Ajax Spreadsheet Widget: dhtmlxSpreadsheet

dhtmlxSpreadsheet is an open source Ajax spreadsheet widget written in JavaScript and PHP (also available as a plugin for WP, Joomla, etc.). It allows you to quickly add an Excel-like, editable data table on a web page.

If you need to display some data in a table view and would like to put it on the web for sharing or further editing, you might consider using online spreadsheet services. However, what if you want to keep data on your own server? With dhtmlxSpreadsheet, you can store the data on your side and show it in a web-based spreadsheet in edit or readonly mode.