PostBooks from xTuple is a fully-integrated ERP, RM, and accounting system for small to midsized businesses. It uses a Qt interface and runs on several platforms, including Linux, Windows, and Mac.

Postbooks includes the following modules:

  • Accounting (general ledger, accounts receivable and payable, bank reconciliation, financial reporting)
  • Sales (quotes, order entry, sales reporting, shipping)
  • CRM (universal address book, incident management, opportunity management, to-do lists, project management)
  • Purchasing (purchase orders, receiving, vendor reporting)
  • Product Definition (items, infinite-level bills of material)
  • Inventory (multiple locations, other advanced warehouse features)
  • Light Manufacturing (work orders, strong support for make-to-order)
  • OpenRPT open source report writer