A simple interest loan payment calculator and amortization table generator. Can be a fun activity for students studying simple interest, or for anyone interested (no pun intended) in how loans work.

VTERM is a browser based billing database manager and processing system that allows you to securely processing entire billing databases from your desktop without uploading data to a webserver. Accepts your flatfile billing database or create one from scratch through the handy editor. Allows you to delete and modify client billing data in realtime.

Web Host 5.4 is a great billing software for a cheap price. Does everything you need for e-mail billing, customer login etc.

Wedesignquote.pl is a perl script that was made for web designers who need active content on their webpages generate interest in their web design services. The script provides quotes to prospective clients which is emailed to the owner of the site and the web surfer has the option of having the quote emailed to them also. Webdesignquote gives you 2 chances to generate leads from people who are casually viewing your site.

WebFinance v1.0 is a suite of financial calculators including mortgage calculators, investment calculators, retirement calculators and general purpose loan calculators. Functions include Balloon Mortgage, Biweekly Mortgage, Mortgage Pre-Payment, Loan Affordability, Retirement Income, Annuities, IRA Withdrawl, Auto Lease, and more.

Perl Module for tracking WorldPay Junior transactions and to handle callback verification Note that this module is only the backend necessary to adding support for Worldpay Junior service to your own scripts. You need to handle all of the user input/output and other processing. The module distribution includes a separate script that, if run from cron on a daily basis, will keep your exchange rate data up to date with that used by WorldPay thus allowing the script to handle payments in other currencies.