OpenERP is a complete business application suite. It covers CRM, accounting (analytic and financial), production management (MRP), stock management, sales and purchases management, task automation, marketing campaigns, help desk, POS, and more. Technical features include a distributed server, flexible workflows, an object database, a dynamic GUI, an XML-RPC interface, and customizable reports.
BusinessTools (business_tools) is a Python package for the handling and validation of commonly used business transaction events such as validating Finnish business IDs or generating bank transfer reference numbers. It supports Finnish company IDs, Finnish bank transfer reference numbers, Finnish bank account numbers (BBAN), and international bank account numbers (IBAN).
CRM+ is user-friendly, easy-to-understand customer relationship management (CRM) software for getting your company's data centralized and organized. It supports the invoicing, contact management, project management, business history, business tasks, reminders, knowledge base, and many more customer related functions. It was built using the FileMaker database engine. It is available in a single-user edition and a network-capable multi-user edition.
Jledger is a Java Business Accounting API that consists of invoicing, general ledger, stock/inventory control, and other business APIs that will assist Java developers in building business software with ease. It will take care of the business logic like accounting double entry, Stock Balance and management (FIFO), etc., and seamlessly integrate each part of business operation as a whole.
YaBS is enterprise resource planning software that manages products and contacts as basic data, generates offers, orders, invoices, and reminders from it, and includes basic book keeping. It writes PDF or ODF (OpenOffice format) documents, and is a multiuser system. It is the successor of MP Invoicing. It can use any JDBC compliant database as a backend, and works in heterogenous networks, allowing fine grained security settings. It can also be extended with modules.