Open Source Point of Sale is a web based point of sale application
Accounting, invoicing, inventory and payroll software for Linux
Free Open Source Accounting and Club Systems
uniCenta oPOS - dynamically evolving POS project
Membership management software
Stability POS software, Free soft develop from Openbravo POS
Point of Sale Operating System
JEE based Accounting web-application.
Accounting for Linux
PHPawn is a web-based and visual basic pawnshop program.
Invoice and office utilities program for customer managment
inventory system with barcode support
Building High Quality ERP and Accounting Software for SMB & SME
PHP Stock Inventory Management System
The Open Source Invoice Management Software
PHP Stock Inventory Management System - POS
ShelterOps - Animal and Wildlife data management software
Web based easy POS system written in PHP with MySQL database
POS system with Sales, Inventory, Purchasing, Receiving and Transfers
A simple cash register app for makeshift POS