Sigma grid-Ajax editable data grid
Inline editing, keyboard data navigation, nested multiline headers, sortable and frozen columns.
Slice rendering and built-in paginal output allow you to manipulate huge datasets on the fly.
Powerful aggregation by group and printing technology, to make it easy to build a traditional-look printable reports.
OGNL format supported, smooth objects converting between presentation layer and logic layer.
Extensibility enable you to replace built-in cell editor with custom external component (user defined editor), present cell data as your customers' wish (user defined renderer).
Plentiful attibutes and event handlers give you more flexibility without coding too much.
Export and import in CSV / XML / JSON format, to support further editing within spreadsheet or any other applications.