The LinkChecker script is a personal, password protected database that you can use to keep records of all link trades that you do with other webmasters, as well as links that you have bought and sold.
It then periodically checks the links you are supposed to be receiving, and lets you know via email if a webmaster drops your link.
What users of the script have to say:
"Thanks for the nice simple script."
"Installed and looks good thank you. Just waiting to see that the cron job is all okay but I am impressed."
"Thanks for everything- already recommended the script to someone for you. I think it will be popular for people who want it to do what it does."
"Just letting you all know the script is running perfectly and is perfect for what it's designed for. You enter your sites, the trade sites and anchor text and forget it. If a partner drops a trade, you get an email. Easy-peasy lemon sqeezy."
REQUIREMENTS:
PHP5
MySQL
IONCUBE installed on server
$30
Installation is simple. However, there is an optional $10 install service if required.

One step install screen

Simple admin interface for keeping an eye on your link trades

Extremely flexible addition of new trades of any description