JFire is an ERP, CRM, eBusiness, and SCM/SRM solution for business enterprises. It uses J2EE, JDO, and Eclipse RCP, and is designed to be highly customizable. It is a complete and extensible solution that fulfills business needs like user management, online trade with business partners, points of sale, various distribution channels forming a distribution network, store management, etc.
The Java Fiscal Device API is a medium-level API to communicate with fiscal devices such as fiscal printers. It handles the communication protocol, the formatting and parsing of the protocol packets, and provides event-based notification for certain events such as out-of-paper events. It was made for Hasar printers (in use in Argentina and other countries) but also works fine with Epson printers.
Lemon POS point of sale system for KDE 4 targeted to small and medium sized business. It is not focused to a specific sector and could be used at a general store, a fast-food restaurant, or a book store. It has been tested with parallel port ticket printers and barcode scanners, probably works with touch screens, supports product photos, and has a grid view.
Monetra is a scalable payment processing engine for Linux, Unix, and Windows. It is designed to handle credit, debit, gift, EBT, and check authorizations and is certified to support major clearing house protocols. Features include support for multiple modems, multiple merchant accounts, and multiple processors, all simultaneously -- as well as IP and SSL connectivity along side SQL database support. Designed in C, conforming to POSIX standards, and utilizing light weight processes (threads), this product is able to handle a large number of transactions with high speed and minimal CPU usage.