[ Thanks to An Anonymous Reader for
this link. ]
“In this edition of 5 Open Source Products to Watch, we
take a look at billing systems. That’s right, there are open
source applications available for invoicing and billing customers.
They’re open source, Web-based and can be extended and
integrated to suit specific needs. Best of all, they don’t
cost a red cent.“1. AgileBill
AgileBill was released as a commercial product in 2004 and then
open sourced by its creator Tony Landis in 2008. AgileBill is a
billing and invoicing application suitable for the
membership/subscription type of business model, including Web
hosting companies, ISPs and VoIP providers. AgileBill features
plug-ins for payment processing, provisioning, and interfacing with
third-party applications and services. It has also given rise to
the AgileVoice and AgileISP VoIP and ISP billing applications,
respectively.”