Excel-sort-worksheets is a project mainly written in Visual Basic .NET, it's free.
A VBA script to sort worksheets in an Excel workbook by their name.
This is a VBA script that will sort the worksheets in a given Excel workbook for you based on the worksheet name. To make this work for you, you'll need to create a macro enabled workbook and copy in this VBA code manually. Other than that it should work out of the box.