MooTools Datagrid Component: Free OmniGrid, Easy to Use
OmniGrid is a free grid component for MooTools that has advanced features.
Having inspired from Flexigrid (for jQuery) & sortableTable, OmniGrid offers a similar functionality.
Besides client-side sorting, with a serverside script (a PHP one is mentioned), it connects to the data & can easily sort/paginate an unlimited number of records.
Columns can be resized, multiple records can be selected (data inside is shown with an accordion), the look can be customized & more.