[ubuntu] open source software to schedule and follow work activities

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http://ubuntuforums.org – Hi, i'm looking for an open source software that can help to my IT department to schedule, assign workers and follow and evaluate work activities, the objetive is to manage activities, worker in charge, date of begin, date end and so on, so my question is: can you give some names of this kind of app that i can use? otrs could help me? regards (Hardware)