Official Addons

This addon allows you to configure a number of additional invoice/billing related options specific to EU invoicing & VAT requirements
Last Updated: 1st July 2011
2054 Votes Free
This action hook allows you to provide free trial products which expire after a set number of days and send an email template notification to prompt the user to upgrade to a paid version
Last Updated: 26th August 2009
1806 Votes Free
Integrate Google Analytics tracking into your signup process simply and easily with this free addon module
Last Updated: 2nd September 2011
1632 Votes Free
Lookup & View Full Details of Transaction IDs as well as view your Balance on the admin homepage
Last Updated: 8th October 2010
1594 Votes Free
Get Organised with the Official Project Management Addon from WHMCS - Time Tracking & Billing, Task Lists, File Attachments, Client Portal, and more...
Last Updated: 11th January 2012
577 Votes Commercial
The eNom New TLDs addon is a seamless solution for integrating Watchlist and new TLD launches up to General Availability right into your WHMCS website.
Last Updated: 14th December 2012
466 Votes Free
KashFlow is an accounting system primarily for UK small businesses and this addon automates the entry of paid invoices into the KashFlow system.
Last Updated: 4th July 2011
306 Votes Free
Sell backup accounts with ease using the solution of choice for the majority of backup solution providers. Ahsay can backup virtual machines, database servers, email servers, file servers, desktops and notebooks.
Last Updated: 23rd December 2010
214 Votes Commercial
Stores clients names/address information at the time of invoice generation so that changes to profile data do not affect existing invoices
Last Updated: 17th August 2011
198 Votes Free
This addon allows you to automate FreeRadius account management with WHMCS. FreeRADIUS is the popular open source RADIUS server solution used to offer Dial Up Internet & Broadband Services.
Last Updated: 28th September 2011
162 Votes Commercial


WHMCS is easily extendible through the many Developer Resources we make available, including modules, hooks, addons, API's and templates. So here you will find many third party developed extensions that can enhance and add to what WHMCS can do for you, as well as a number of Official Addons created by ourselves.

Disclaimer: The addons available here are provided by third party developers. WHMCS has not vetted the code in any of the addons listed here, and cannot be held responsible for any problems resulting from the use of them. We are also unable to provide support for any issues with third party code.

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