Square for Retail - Point-of-sale app & set of tools for retail businesses
Vyapar - Vyapar is a free GST billing and accounting platform that handles the invoicing queries with the help of an inventory management system.
Oliver POS - Oliver POS is a plugin for WooCommerce that creates a Point of Sale system around your online store. With a simple interface, customizability and a vast array of features, Oliver POS is built to link your in-store and online sales.
Zoho Books - Smart Accounting for Growing Business
NCR Counterpoint - NCR Counterpoint offers the best retail POS system. Comprehensive features to easily manage sales/vendors, track inventory & maximize profits. Learn more!
QuickBooks - Business runs better with QuickBooks, the #1 accounting solution for small business.