OneOrZero                  http://helpdesk.oneorzero.com
Helpdesk software that provides accurate ticket tracking, unlimited support/user groups, several custom options, time tracking and easy use .

ExoPHPDesk               http://php.exocrew.com
Features include
- Unlimited Members, Administrators, Staff supported - Powerful Live Chat included
- Rapid New Version Releases - Fetch mail through IMAP/POP3

Yudo Helpdesk            http://www.freedesk.it   *ASP*
Yudo is written in ASP and supports ACCESS database and also SQL server.

phpCOIN                       http://www.phpcoin.com
phpCOIN is a php/mysql based package for hosting resellers to manage clients, orders, invoices, etc. The package supports "pay links" as the method of billing.

NIXT whmManager     http://nixt.org
whmManager is a program written in PHP (with MySQL) that provides webhosts with an easy to use interface with which to manage and bill their clients. It can be used by any host, with or without CPanel.

myInvoice                     http://widgetmonkey.com
This is an invoice program for freelancers or small businesses. Clients are automatically sent a thank-you email when an invoice is paid, and you can also send them notification emails when their invoice is online. Clients can view/print invoices when they need, and they can view their invoice history

PerlDesk                       http://www.perldesk.com           $49.00
PerlDesk is a fully featured browser based helpdesk/email management application designed to streamline the operation of managing emails or support requests, with built in tracking and response logging it is an ideal solution for companies with one or more members of staff or for those who want to organize client support.

Kayako eSupport       http://kayako.com                       $99.95 - $349.95
The most feature packed helpdesk that not only helps you to serve your customers better but also puts your customers back in control and help themselves.

Cerberus                       http://www.cerberusweb.com     $99.00 - $499.00
Cerberus Helpdesk is an email response system built to diminish the need for redundant, time-consuming human interaction with your customers. The system is built to allow your support/sales/billing/etc. department to react quickly to inbound customer email inquiries. It was written originally as a trouble ticket system.

WHM AutoPilot          http://www.whmautopilot.com    $19.95 - $149.95
WHM AutoPilot has the features that today's start-up and established webhosts are looking for. Using proprietary integration features into the popular WHM/cPanel server management software, your WHM AutoPilot will provide you with Automated account creation, suspension, import capabilities, domain propagation monitoring, server rotation and more.

ClientExec                   http://clientexec.com                    $99.00
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.

ModernBill                  http://www.modernbill.com          $24.95 - $499.95
ModernBill has the features that Webhosting operators need for efficient control of their billing. It offers the latest in automation options. ModernBill will allow your customers to automatically sign up for your services and automatically create invoices which can be sent to those customers. You will be able to automatically charge your clients credit cards and keep an automatic ledger of all of your accounts