jxl
Interfaces 
BooleanCell
BooleanFormulaCell
Cell
DateCell
DateFormulaCell
ErrorCell
ErrorFormulaCell
FormulaCell
Hyperlink
Image
LabelCell
NumberCell
NumberFormulaCell
Range
Sheet
StringFormulaCell
Classes 
CellFeatures
CellReferenceHelper
CellType
CellView
HeaderFooter
HeaderFooter.Contents
SheetSettings
Workbook
WorkbookSettings
Exceptions 
JXLException