1)   Excel Invoice Manager Express 2.5.1008
Seamlessly integrated with Excel, Excel Invoice Manager provides a true What You See Is What You Get invoice template, allowing you to manage customers, products, invoices and payments easily.

 2)   Excel Invoice Manager Pro 2.8.1012
With this flexible billing software & invoice software, you can create invoice, email invoice, extract an invoice as a file, track inventory, and manage customer accounts/bill customers. The Pro edition of the software has built in network support.