OpenERP - Open Source Business Applications
OpenERP is a comprehensive suite of business applications including Sales, CRM, Project management, Warehouse management, Manufacturing, Financial management, Human Resources, Point of Sale, Accounting, Purchase, Marketing and lot more. It has over 700 OpenERP modules available on Launchpad. The package contains OpenERP server, web client and GTK client.
OpenERP CRM helps to track sales team best leads and opportunities, Run Marketing Campaigns, Customize your sales cycle, Analyse the stats and forcast the sales.
Its Accounting and Finance module provides support to manage payments, Control the invoice, Generate analytic accounting operations integrated with timesheets, projects, invoices, warehouse, etc. It supports mult-country, multi-company and multi-currency.
It also includes an ORM, a Workflow engine, report designers, a dashboard designer, a module system, an automated migration engine, and much more.
Source code: https://launchpad.net/openobject