WHMCS Out Of Office
This module allows you to create out of office replies for ticket replies, and display an out of office warning in your client area when a client creates/responds to a ticket out of hours.
WHMCS Err Manager
This module deals with all the connection errors you may encounter when running a web server.
This module adds custom notifications to the clientarea.
This module is designed to perform maintenance tasks on your WHMCS site and database. It will optimize and prune the database, remove old attachments, empty template caches and much more.