Effect Support

One feature I really want to have in the application is the ability to track running effects.

What are running effects? For example, say a barbarian takes damage in melee and gets upset, so he rages. The temporary boost in strength and constitution (and penalty to wisdom) should be tracked for the appropriate number of rounds.

An effect can also more than just a class ability--spells should be tracked in this way as well. Likewise, character abilities should be recorded as well.