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.
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.
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.