Just curious, is this just a help desk?

ClientExec is a tool to help web hosts manage and support their clients efficiently. NEWEDGE Services Inc is the company behind it. We are web hosts too, along with many people who helped in the testing and development of version 1. Thousands of hours were spent to create a tool with intelligent design and clean precision. Unlike many client management packages, ClientExec does not try to be all things to all people; you are in control. Instead we want it to be a natural addition to your business, a powerful tool you use, not get lost within.

Customer Database
ClientExec has at its foundation a well tested, practical client database. Everything else flows from here. Entering information is easy and natural, with options for customization and growth. Built on the dependable, powerful MySQL database engine, you will love the performance and reliability.

Support Center
ClientExec includes a fully integrated support ticket system. The overview section provides quick access to open tickets at a glance for both administrators and clients. It has features that provide the options you expect and the ease of use we demand.

Invoice Manager
ClientExec gives you complete control of invoicing. Clients can be invoiced automatically at regular intervals or at any time for extra work or services. Billable items can be merged into existing invoices or included in new ones. Invoices can be viewed and printed using the built-in PDF engine, which is great for clients who need traditional invoices for their records.

Customization
ClientExec is designed to be flexible. Custom fields can be easily added through our simple interface. You are in control with the powerful administrator options, allowing or disallowing those features you want. The entire look and feel of CE can be customized through the use of skins and the extensible API makes just about any payment gateway available.

Something works like ModernBill, phpManager, or PerlBill. Some may differ but generally is the same.

It seems like a good tool and it's also afordable.