Generating an SVG DOM Document describes the generation of an SVG barcode in Java.

ViArt's PHP CMS is a web based Content Management System designed to make the creation and customisation of a dynamic ecommerce portal as simple and flexible as possible.

Ruby/Finance allows access to changing financial data, such as currency conversion rates and stock quotes.

Ruby/Amazon is a Ruby language library that allows programmatic access to the popular Amazon Web site via the REST (XML over HTTP) based Amazon Web Services.

Makecheque is a a tool (written in Ruby) to print bank cheques, either using bank-supplied stationey, or blank check paper.

TCLink is a client API which can run credit card transactions over TCP/IP.

Conversion Tracker (Hit Based) will allow you to see how many sales are being produced relative to the number of people visiting your website.

Eqonomize! is a personal accounting software, with focus on efficiency and ease of use for the small household economy.

Hidden PHP eBay Counter System provides you auctions counter tools for eBay.

Interchange is an open source commerce server and application server.

Bid monkey is a command line / GUI tool that automatically bids on eBay auctions at the last possible moment ("sniping").

BidWatcher is a free auction tool for eBay users.

Ledger 2.8.4 - SQL-Ledger is a double entry accounting/ERP system.

Simple Expense Manager script allows you to perform simple expense management.

QHacc is a personal accounting program.

Paymaster is a Free Software payroll and HR application designed for small to large organizations.

Grisbi is a personnal accounting application running under GNU/Linux and Windows, released under the GPL licence.

Ledger is a command-line accounting program, which uses a simple text file as a ledger.

GnuCash is personal and small-business financial-accounting software

Bookland (also known as bookland.py) is a program for generating EAN-13 bar code symbols

vtiger CRM is an enterprise-ready Open Source Web-based customer relationship management software mainly for small and medium businesses.

MRBS is web application using PHP and MySQL/pgsql for booking meeting rooms.

NOLA software is a PHP-based business accounting and inventory application.

Visale is a self-administered and self-managed classified sales software program written in Perl and MySQL.

Getquote script will grab stock quotes from Yahoo.