WHMCS is quite extendable, and we’re proud to have put together quite a few WHMCS addons. Some free, some paid, they’re all available and right here. Click on the script title for a bit more information, if available.
Need your own addon developed? Need some tweaking to one of ours done? Hey, we can do that for you as well. Please do contact us and we’ll get back with you as soon as we can!