SolidState is a Web-based billing and customer management solution for Web hosting providers. It is written in PHP, uses MySQL, is fully templated with Smarty templates, and is built on-top of a modular framework with support for third-party payment gateways and domain registrars. There are two interfaces: an order/signup interface for new and existing customers to place orders for hosting services and domains, and a manager interface for administering customers, services, and orders.
GASELL is a Web application that aims to manage a French 1901 association. It stands for "Gestion d'Association Sous Environnement et Logiciels Libres". Main features: It can keep track of members' contributions, create a grid of contributions' prices, search on members' personal information, manage activities of the association, and manage objects and loans of objects.
phpFaber eForm Download will allow you to sell your digital products or services. phpFaber eForm Download is an easy and powerful tool that enables you to have full control of your electronic downloads. Multiple downloadable products are supported. Downloads can be optionally restricted by special codes which work only once and only for a fixed number of days. Time restrictions can be adjusted for each download. Download links are encrypted. Integrated payments through PayPal are supported.
PayPal IPN Agent is a PHP class for handling backend processing of PayPal Instant Payment Notifications. It correctly validates the IPN itself and the PayPal SSL Certificate, and has hooks for checking prices and taking actions on a "Completed" payment. It was designed to work with any kind of shopping cart or payment tracking system by storing all IPN transactions in a simple sharable DB layout for later examination.
libgeier is a library to send gathered tax declarations data to the German inland revenue offices (using the Elster2/Coala-approach). It is capable of validating, encrypting, digitally signing, and sending the data, which has to be supplied as an XML tree. It can generate transmission protocols for you. A small command line client is included.
FreeCoins is an accounting program written in C++ for PalmOS. It features multiple accounts in multiple categories, scheduled/recurring transactions, split transactions, a proper (collapsable) account tree, double entry bookkeeping (similar to GnuCash), cleared/uncleared transactions, separate cleared/uncleared balances totals for the current account, current category, and all accounts in all categories, and the ability to add/delete/modify accounts and transactions to suit your needs.