If you're looking for an invoicing tool that is completely integrated with your accounting check out Wave. www.waveapps.com/invoicing It is surprisingly free

If you're looking for an invoicing tool that is completely integrated with your accounting check out Wave. www.waveapps.com/invoicing It is surprisingly free invoicing tool that also accepts credit card payments (powered by Stripe). Wave provides a full featured small business eco-system that you will also likely enjoy.