Issue Tracker for Open Atrium 2.0
I dont know whats OA2 friendly but Case Tracker, and Project Management are both D7 friendly.

From the project page of Case Tracker:


  Actually, the 7.x-1.x-dev version has the content types for Project
  and Cases working without problems. The Notifications, Actions and
  View integration that needs to be tested.
  
  The development is active and we're working toward a release. Check
  out the 7.x-1.x branch and post your patches!


From the project page for Project Management:


  Project management software, allowing you to manage:
  
  Organizations, Teams, People, Projects, Tasks, Tickets, Timetrackings,
  Notes, Invoices, and Expenses. Each of these features is managed as a
  separate module within the suite.