InvoiceOcean!

GnuCash is personal and small-business financial-accounting software, freely licensed under the GNU GPL and available for GNU/Linux, BSD, Solaris, Mac OS X and Microsoft Windows.

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.

Send, track and collect payments quickly. Great for teams, freelancers and service providers. FreshBooks is an easy cloud accounting app for small businesses and freelancers, specifically designed to save you time billing clients. Create professional invoices, capture expenses with ease and effortlessly track time on projects; it’s all here, plus you’ll be ready for tax time.

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.

Invoicing software & easy accounting. Create your first invoice in less than a minute. Take charge of your own accounting and get an overview of your business finances. Designed for small businesses and freelancers.

Invoiced is simple invoicing for freelancers and small businesses. We allow businesses to accept online payments in just a few clicks. Our focus is helping businesses get paid on time. In order to achieve this we built an entire workflow around invoicing that ensures customers will receive their invoices while making it easy for them to pay. Invoiced keeps you focused by tracking who owes you money.

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.

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.

Elorus is an online invoicing, cash flow and billing platform, helping you issue your invoices and get paid online easily, quickly & reliably!

Free online accounting software for small businesses, offering:

MoneyPenny is the best online solution for small business and freelancer. It is the only tool that simplifies business management, record keeping, time tracking and online invoicing altogether. It’s designed to overcome the tracking and reporting struggles of small business owners and freelancers. No pain! More gain!

We started Bearbuk to bring small and medium sized business to another level with smart & intelligent online accounting software that manage of sales, invoicing, billing, stock management, accounting, inventory at one single place.