Dolibarr is a simple Web application with ERP and CRM capabilities. It is designed for small and medium companies, freelancers or foundations, and can be used to deal with all things you require to manage your activities, such as management of products, stocks, commercial proposals, invoices, orders, members of a foundation, and mailings. A single executable that installs the server and database is available for people with no technical knowledge.
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.
Web Based Restaurant POS is a user-friendly Point of Sale system for restaurants. It features touch screen optimizations (of course, it can be used with normal screens, too), magnetic card access (a waiter will slide a magnetic card through the card reader to log in), orders automatically printed in the production departments (kitchen, bar, etc.), advanced reports which can be filtered and sorted, graphical representation of reports, several access levels (administrator, manager, waiter, etc.), an easy-to-use recipe system (products contains several ingredients), and inventory updated in realtime based on product recipes. An online demo is available.