jxl
Interfaces 
BooleanCell
BooleanFormulaCell
Cell
CellFormat
DateCell
ErrorCell
ErrorFormulaCell
FormulaCell
Hyperlink
LabelCell
NumberCell
NumberFormulaCell
Range
Sheet
StringFormulaCell
Classes 
CellReferenceHelper
CellType
SheetSettings
Workbook
WorkbookSettings
Exceptions 
JXLException