Black Sheep Invoices is a free, GNU-licensed script for managing invoices.

Features of Black Sheep Invoices:
- Simple to use. Quickly generates clear, attractive invoices
- Printer-friendly and PDF view/print of all invoices
- Entirely brandable to your company or person (no reference to Black Sheep Software)
- Option to upload company logo
- Database is customizable to store whatever invoice data you need
- Choice of $ or £ currency
- Stores client information to allow you to re-invoice the same client multiple times
- May set custom invoice numbering scheme, specify whatever invoice date you wish
- Build in "Flagging" mechanism to let you create invoices by matching up existing items to clients
- May customize CSS to change the appearance of the invoices and PDFs

Requirements:
- PHP 4.3 or later
- MySQL 4 or later
- A modern, javascript-enabled browser
- Ability to change the permissions of files and folders on your server
- PHP GD2, with JPG and TTF support
- AFPL or GPL GhostScript 8.0 or Higher
- Adobe Acrobat Reader
- GhostView 4.7 or Higher