Invoice Me is an online invoicing system, with automatic billing status indicator. With the correct IDs, customers may search their own invoices, and view the payment status (with an option to hide paid invoices). It features search, add, edit, and delete admin interface. When creating a new invoice, the administrator can opt to email a copy of the invoice directly to the customer. Viewers can print the invoices easily via a Print Mode.
ASTPP is a billing solution for Asterisk and FreeSWITCH. It supports pre-paid and post-paid billing with call rating and credit control. It also provides many other features such as calling cards, least cost routing (lcr), did management, resellers, callbacks, etc. ASTPP is able to integrate with OSCommerce to provide a Web store for your users to purchase calling cards and sign up for VoIP accounts.
Admelix is a live CD distribution based on Ubuntu Linux with tools for business administration. Its main objective is to guide managers of small and medium-size businesses towards GNU/Linux and open source software. In addition to the live CD, the project's Web site provides information about open and free tools for business administration.
AgileBill is a stand-alone, Web-based billing application that completely automates EBPP, subscription management, automated invoicing, recurring billing, account management, reporting, newsletters, and more. It also features optional modules for automating affiliate management, content protection and delivery, database mapping and syncing, Web hosting and domain provisioning, tickets (CRM), and more.
The Amberdms Billing System is a Web application that provides accounting, invoicing, service billing, and time keeping functions. It is designed for small and medium businesses. This program is developer-friendly with a SOAP API, as well as being appropriate for ISPs with service usage billing features.