erp

Basically enough to run a small business. Needed for multiple computer stores within the same company.
Sort of like Quickbooks/Myob, but with customisability through extensible modules.

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.
Stores
SMS notifications