OpenERP (formerly TinyERP) is an Open Source enterprise management software.
It covers and integrates most enterprise needs and processes: accounting, hr, sales, crm, purchase, stock, production, services management, project management, marketing campaign, management by affairs.

Once in production, it automates and help you to control all activities: sales triggers manufacturing orders, accounting entries are updated by stock operations, incoming mails are tracked in the system, the integrated document management system helps your team to collaborate.