SQL-Ledger is an extensible, customizable, double entry accounting system written in perl. Accounting data is stored in a SQL Server. Any text or GUI browser can be used for the display. In addition to the browser display, data can also be processed from the command line. The entire system is linked through a chart of accounts. Each item in inventory is linked to income, expense, inventory accounts and tax accounts. When you purchase and sell goods and services the accounts are automatically updated. The assembly feature allows you build manufactured goods from parts, services and assemblies. When you sell assemblies all the accounts linked to the individual parts, services and assemblies are automatically updated and the inventory is adjusted for the items. Invoices, Packing List, Income Statement, Balance Sheet, Sales and Purchase Order are generated from templates and can be changed to suit your needs. Templates are provided in html and tex format. The tex templates can be processed with latex to produce postscript and PDF documents. Sales and Purchase orders are also a convenient way to create recurring invoices or to keep time sheets. Sales orders may be used in lieu of Quotations or work orders. Change the wording either internally or by adding an English to English translation and you have a new system.