AgileBill is a Flexible Billing and Invoicing Application for a number of markets, including Web Hosts, ISPs, VoIP Providers, and membership/subscription type models. It features numerious plugins for payment processing, provisioning, and interfacing with a variety of 3rd-party applications and services. Development began as early as 2002, and initially released commercially in 2004. The project was released to open source in November 26, 2008. The project homepage is located here: http://agileco.com/agilebill-open-source-billing-software.htm The bug tracking and feature requests are located here: http://tony_landis.lighthouseapp.com/projects/20914-agilebill/tickets The developer's personal website is: http://www.tonylandis.com For a full list of features, see these version release announcement: http://forum.agileco.com/forumdisplay.php?s=&f=26&page=1&pp=20&sort=lastpost&order=desc&daysprune=-1 The user community is located at: http://forum.agileco.com This software includes the functionality the two projects AgileVoice and AgileISP, websites: http://www.agilevoice.com http://www.agileisp.com