Free Invoicing software.
Excel VBA with Jet Database.

Best Invoice

Download Page
Make sure you read setup page before you download Best Invoice zip file.

Download to your PC
Create a folder on OneDrive and extract the BestInvoice.xlsb and the DATA.jet database into the folder. 

Open BestInvoice.xlsb  Follow the instruction regarding macro settings and trust centre.
Then go to the Sales Form Tab and start making invoices

Enjoy your free Best Invoice