Advantages
High performance (30000-40000 values per second)
Open an existing spreadsheet feature
Convenient object model
Support for all Excel formatting options
Microsoft Office is not required
Compatibility with standard Delphi's Excel components
TDataset2Excel component. Populates a spreadsheet from TDataset descendants
TDBGrid2Excel component. Populates a spreadsheet from TDBGrid descendants
Features
Support for XLSX file format (Excel 2007/2010 file format).
Open an existing excel file
Access any cell values (number, string, date, boolean, formula)
Home:
http://www.nika-soft.com/nativeexcel3/