Manta

Manta is a flexible invoicing application for mac users which allows to build custom beautiful designed invoices without the need for any graphic tool! And the best feature actually is that it is free to install and use without the need to pay even a penny!

It is a perfect fit for freelance developers, designers or whatever you can make money with and you need invoicec for.

Here are some of the features:

• Simple and clean user interface
• Support for almost every currency
• You can customize the look and feel, e.g. put in your company / your own logo
• Choose from predefined template styles e.g. minimalistic
• You can collect and manage contacts inside the application and use them as a target easily
• Can generate PDFs
• It is so simple to create a new invoice that you can potentially skip a extra person for handling the invoices

My own comment:

I really enjoy the simplicity and the beautifully designed interface of the application! I'm not a freelancer yet, but when I do the step and switch to be a freelance developer, I'll for sure consider using this tool! It can be used out of the box and is free to use; this is a big plus in my eyes. :)

Cheers; and I'm looking forward for some good reviews from you guys