The emailing billing option in this program is the only one of its kind that i've come across, good all round program for small business at a great price

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[url=http://www.softpile.com/Business/Finance/Review_09832_index.html]invoiceit! - invoicing software[/url]
All-in-one business software combining invoicing, quotations, cashbook accounting, diary, marketing, inventory control and more - intuitive design makes it easy to use. Suitable for networking.
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excellent value for money.Easy to use.