Embodiments of the present invention address deficiencies of the art in respect to project management tools and provide a method, system and computer program product for an activity-centric project management tool. In one embodiment of the invention, an activity-centric project management tool data processing system can be provided. The system can include an activity-centric project management tool, one or more ad-hoc communications tools externally coupled to the activity-centric project management tool, and ad hoc communications activity objectification logic coupled to both the activity-centric project management tool and the ad-hoc communications tools. The logic can include program code enabled to integrate external ad-hoc communications among task nodes of an activity hierarchy modeling a project plan.