Enough to run a small business.

Needed for multiple computer stores within the same company.

Quickbooks is too expensive, and has limited customisability.

• Asset tracking (with a nifty .js that inventories a win PC sw&hw).
• Franchises (allows a customer to be "owned" by a particular user).
• Job tracking Quoting/Estimates
• Invoices
• Purchase Orders
• Receive Payments
• Stock Tracking over multiple stores.
• Item import from CSV/Xls files (perl/xls2csv)
• Timesheets
• PDF generation of invoices for email
• Referrer cards system to reward clients
• Quote -> Invoice, Invoice -> Purchase Order, Invoice -> Receive Payments, Purchase Order -> Receive Stock functionality.

This module set was built on Drupal 6 and is no longer supported, but is available over at drupal.org