Zoho Invoice - 100% free online invoicing software for small businesses.
Invoice SA - Send invoices faster. Get paid faster.
Express Invoice - Express Invoice is the easiest system for creating and tracking quotes, orders and invoices for your business. Use web access to view your data from anywhere.
Tinyinvoice - Super-simple invoicing. Create the invoice and print it.
Inveezy.com - Inveezy is a free invoicing website with no login.
Simple Invoices - Never Wait For Clients To Pay You Again!