Dolibarr-Nixgen

Dolibarr is an open-source ERP and CRM suite for managing a small or medium business from a single web interface. It is built in PHP and runs against a MySQL, MariaDB, or PostgreSQL database.

The platform is modular: you enable only the features you need, including customer and supplier management, commercial proposals, orders, invoices and payments, inventory and warehouses, point-of-sale, project and task tracking, HR (expense reports, leave, timesheets), email campaigns, and double-entry accounting with bank reconciliation.

Typical use is as a self-hosted back office for SMBs, freelancers, associations, and foundations that want an integrated alternative to juggling separate billing, CRM, and stock tools. Its broad module set makes it a good stress test of a PHP toolchain plus a managed SQL addon.