There are a plethora of options. Quickbooks lets you set invoicing and payments online, and other options are Freshbooks, InvoiceDude, Billable and more. Here is a list of 48 different free invoicing options you don't have time to test. After testing a variety of invoicing software, I continue to appreciate Zoho Invoice and it is still at the top of my list. It is powerful, flexible and intuitive.
Zoho Invoice is an easy-to-use online invoicing software that is built for small businesses and freelancers. Zoho Invoice helps you send beautiful quotes and invoices, track the status of each invoice, automatically send payment reminders to customers, and receive payments online. Try Zoho Invoice for free today here: https://www.zoho.com/invoice