Invoice Ninja

AccountEdge is a powerful, easy-to-use, small-business accounting software for the Mac and Windows desktop. With AccountEdge, business owners can organize, process, and report on their financial information so they can focus on their business. Features include: accounting, integrated payroll, sales and purchases, contact management, inventory tracking, time billing, and more. Invoicing - Create and send customer invoices for products, services, or time and track payment status on open sales. Expenses - Manage your vendors, payments, and recurring transactions. Banking - Manage money in and out in as much detail as you want. With integrated bank feeds and auto-match, reconciling your accounts is a breeze. Payroll - Pay your employees and tracking their pay, accruals, and expenses is critical to your business. Inventory - Manage your items and services and track their stock by location to ensure you have enough products on hand.

WeInvoice is a free online invoice platform with invoice generators that you can use for your business as well as a huge collection of well-crafted invoice templates for you to customize.