From Assist IT Solutions:
Inovice Ace is a simple Invoicing system for small businesses. It allows for non VAT/tax registed operation and none VAT/tax registered companies. Currency and tax can be changed to your countries spec. Invoice Ace can generate many useful reports, including 'Outstanding Debts Report', 'Turnover Report', 'VAT Report' and the ability to automatically generate reminder letters for all customers overdue payment. Version 1.0.2 may include unspecified updates, enhancements, or bug fixes.