Best JavaScript Data Grids and Spreadsheets

jqGrid

jqGrid is an Ajax-enabled JavaScript control that provides solutions for representing and manipulating tabular data on the web. Since the grid is a client-side solution loading data dynamically through Ajax callbacks, it can be integrated with any server-side technology, including PHP, ASP, Java Servlets, JSP, ColdFusion, and Perl.

Preview:

Using checkbox to select a row

Custom row details

Filter by date

Highlight a row