Here is a free online invoice maker to create unlimited invoices. Make simple invoices with customer information, unlimited items, discount, and so on.

Servicejoy is a free online invoice generator with the option to accept payments via PayPal, Authorize.net, and Stripe. Also, create recurring invoices for specific clients.

ZipBooks is a free online invoice generator with built-in time tracker. Generate invoices with ease and send them to customers.

Tinyinvoice is a free online invoice generator for small businesses or startups which lets you create invoices in no time. Check it out.