Posterita POS is a full web POS for large distribution and multi-site Point of Sale for thousands of users. Posterita POS is built on Adempiere/ERP. Posterita POS (Point of Sale) is specialised for the retail, supermarket and franchise industry.
Easy to install and use.
Sad to see that such POS for stores has became inactive. Hope it will be back I am one of the developers of a open source Restaurant POS named Floreant POS. I would welcome restaurant owners to try this and if you find it useful please pass it to your network.