Think-lab :

Fresh Invoices

I have been using FreshBooks for over a year now, and it’s definitely the best online solution that I have found. Some of the issues that FreshBooks has solved for me are tracking expenses, like mileage office supplies and you can also setup recurring expenses. In the free version can setup three clients and send unlimited invoices via email they will send your invoices via snail mail but you will have to by FreshBook stamps. You can send your client an estimate and then turn that estimate into an invoice. If you are interested click the banner below.