If you look for a simple and straight-forward invocing tool. Try Excel Invoicer. It’s an excel file embeded with VBA. You simply need to fill the ‘clients’ tab with clients information, and and then the clients drop-down is shown in the ‘jobs’ tab. After filling in the details of a job, a invoice number is automatically generated and click ‘create invoice’ button, an invoice is then generated.
To design an invoice, simply edit the ‘invoice template’ tab.
I have used for like 7 or 8 years and I find it can fufill all my invocing, accounting and job management needs.
The best thing about managing invoice in an excel file is that you can use the excel features like calculation and sorting.
It’s a freeware. Check out the video here: