Duet

Duet is a very well put together commercial Web application that runs on the classic PHP & MySQL server setup.

It comes with an installation wizard and administration panel where administrators can setup various projects, add tasks, generate invoices and bill their clients.

There's a time tracker for keeping track of billed hours, a reports center to get timely reviews, and the ability to share messages and files with the clients.

If the clients wants to keep a closer eye on your work, they can also register and get a separate Duet client account, with access only to his own project.

Freelancers, developers and companies can use Duet to keep track of their clients, tasks, and invoices, making sure they get payed for all the work they put in for each project, and don't forget about older, overdue invoices.

Features:

• Easy installation
• Low hosting requirements
• Administration panel
• Separate admin & client accounts
• Manage multiple projects
• Task manager
• Share files with clients
• Invoice generator
• Send email alerts
• Exchange messages with clients
• Reports center
• Payments processor
• Project templates
• Time tracking
• Calendar view
• Admin panel themes
• Responsive layout
• Support for translations

Requirements:

• PHP 5.3 or higher
• PHP's cURL extension