phpcrm.com
PHPCRM is a web-based customer relationship management software built with PHP that helps businesses manage customer interactions, leads and sales pipelines. It is offered in two editions: PHPCRM Open-Source, free and self-hosted, and PHPCRM Cloud, a premium fully hosted edition. Core features include lead management, customer relationship management, proposals and estimates, invoicing and billing, inventory, tax, staff and user management, internal messaging and reporting.