Twin Cities Tech has released a pretty powerful plugin for WordPress that transforms it form a blogging engine to an invoice management system ala Blinksale. The plugin is called WP-Invoice and is currently available for free.
WP-Invoice lets WordPress blog owners send itemized invoices to their clients. Ideal for web developers, SEO consultants, general contractors, or anyone with a WordPress blog and clients to bill. The plugin ties into WPĺs user management database to keep track of your clients and their information.
Once an invoice is created from the WP admin section, an email with a brief description and a unique link is sent to your client. Clients follow the link to your blogĺs special invoice page, view their invoice, and pay their bill using their credit card.
Credit card payments may be accepted via Authorize.net, MerchantPlusĺ NaviGate, or PayPal. For recurring billing we have integrated Authorize.netĺs ARB API that will allow you to setup payment schedules along with invoices.
I have to admit, I am pretty impressed by this whole thing, and I look forward to seeing reviews on it. I currently have little need for something like this, but I could see how useful it could be for most freelancers. WordPress does nearly everything else these days, why not manage invoices as well?
Is this something you would use, and if so, does it replace another piece of software or service you are already using? I wonder if this makes certain web services a little nervous?