jxl
Interfaces 
BooleanCell
BooleanFormulaCell
Cell
CellFormat
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