Figured I'd post these here since some of these are pretty helpful. invoiceAddCredit - WHMCS hook to automatically add a percentage of credits based on payment processor. (Inspired by ) chkClientDetails - A WHMCS hook that checks new client details for blocked words and displays an error if such words exist in any of the client fields. (Inspired by this thread.) Extended-Login-Tracker - A WHMCS addon that records all IPs that login and makes them searchable (adapted from 2 different scripts). (Inspired by ) IP_to_Domain - A simple WHMCS hook that replaces a services domain to the dedicated IP assigned to it during service creation (great for VPS services when you want to search for who has had a specific IP in the past and for identifying services since domains in WHMCS don't update for most VPS control panels when hostnames change). (Holy smokes an original!) closeFraud - A simple WHMCS hook to automatically close accounts who are marked Inactive and only have fraudulent orders. If an account has order marked as Fraud but also has an order not marked as fraud, the account is skipped. Runs after WHMCS's daily cron. (Holy smokes an original!) chkProxy - A simple WHMCS hook that checks if the client is using a proxy/VPN prior to ordering (saves tickets and time). (Holy smokes an original!) As you can see I get some original ideas sometimes but I'm always looking for inspiration so if you have any ideas or requests feel free to post them here and I'll see what I can do.