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Membership Software : PayPlans is an open-source Joomla membership, subscription and billing management software. Create a Subscription/Membership website for your online consultancy, club, services or community all based on the power and flexibility...

CitrusDB is a web based customer care and billing software solution (CC&B) that uses PHP and a database backend (MySQL) to keep track of customer information, operational CRM, services, products, billing invoices and credit cards, and support inf...

Open-source billing, CRM, trouble ticketing and automation software for ISPs, VoIP providers and online businesses.

Free open source on-line and mobile banking software. For banks, micro finance institutions, barters and complementary currency systems.

Find and compare the best billing and invoicing software. Compare invoicing solutions using features, user reviews, pricing, system requirements, and more.

siwapp is an open source web application meant to help manage and create invoices in a simple, straightforward way

Convergent Billing Software and Solutions by Agileco

The aim of the Open Source Software Directory is to list the best and most promising open source software available on the Internet.