Mantis Effort
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Mantis Effort is a freeware open source project. The aim of the project is to add effort tracking functionality to mantis bug tracking system. You can do following actions:
  • - add time effort
  • - edit time effort
  • - delete time effort
  • - view reports
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Managers have full rights for their projects. Administrator can  do everything.
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Report will contain information about users and projects for required period.

You can download patch for Mantis 1.0.3 here