A nice set of supplemental rules for Pathfinder that bring mechanics for wilderness exploration, and kingdom and city building. Includes leadership roles (and the benefits for each, and penalties for not assigning them), the kingdom as a "character", building types, kingdom events, and more.
This is a great supplement for any GM wishing to add an element of empire building to their campaign - the possibilities for developing characters and storylines are very good (even if they're not the ones in charage of the kingdom!). This PDF is fully bookmarked for ease of reference.
[4 of 5 Stars!]