Our web-based help desk software application can be used not only to track support tickets from your customers, but also to manage projects inside your helpdesk team. The app has everything a powerful project management tool needs: notifications, project statuses, time-tracking, due-dates etc. etc.
Create project categories, add project members, assign projects to users, search and filter your projects - it's all here.
In fact, we use the hosted version of our help desk app to track our own projects inside the Jitbit Software team. For instance, it makes it really easy to transform a feature-request ticket from a customer into a project devoted to adding the feature requested. And when the project is finished we can simply inform the customer that it's done - all in the same place.
If you already use our help desk, then you are probably familiar with the basic concepts: there's "ticket categories" and there are special users (we call them "technicians"), who have permissions to handle tickets in specific categories. If you want to manage projects in your Helpdesk, think of categories as projects, tickets as tasks and techs as project members.
Since project management is not the main helpdesk use case, you may think that it won't make up for a convenient project management app, but if you think about it, we have all the features you may need:
See also: support ticket software