Moon Invoice!

InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments. The application comes with various options, templates and settings to customize your invoicing experience.

BILLmanager is a linux-based control panel for automating client management, invoicing and billing. This software specifically developed for hosting service providers will help you manage and take complete control of various aspects of your business:

Super-simple invoicing. Create the invoice and print it.

Easy Invoice creation.By editing the invoice template you can get an invoive in Pdf.Just edit, just get the invoice. Simple.

Invoice Ninja is a free, open-source solution for invoicing and billing customers. With Invoice Ninja, you can easily build and send beautiful invoices from any device that has access to the web. Your clients can print your invoices, download them as pdf files, and even pay you online from within the system.

ProperInvoice helps Freelancers, Startups and Small Businesses create and send Invoices and Quotes to customers in under a minute. With ProperInvoice your customers can pay your invoices online. You can also track all your expenses easily. ProperInvoice also helps you monitor key financial metrics of your business in realtime.

Create and download a professional invoice using our free editable invoice template. Customize with your company logo and style.

Rocket Invoice is a web-based invoicing system that allows you to send invoices from your web server—without monthly subscription fees.

Workweek is the perfect solution for freelancers because you can display all your work on your portfolio website and get paid with invoicing and payment processing all through one platform.

Invoicera is an online billing software which is specifically designed keeping simplicity and online invoicing convenience in mind, while at the same time offering the best of the breed invoicing features.

InvoiceBerry is an online invoicing software for small businesses and freelancers. The software is web-based and was designed with simplicity and ease of use in mind. Businesses can create, send and manage their invoices and quotes from anywhere in the world. The software also provides an expense, payment and invoice reminder function.

Make invoices online and convert it to PDF. Automatically calculates totals. It is free and simple. No registration required.