Many houses on or around Roton Hill have distinctive little plaques noting some part of their history. For the most part these are placed through the Norwalk Historical Society, and are listed here. That site lists the plaques, or at least most of them, and has photos of the vast majority of them. But as far as I know it doesn't list their locations, so below I've included a map for the ones I've run across.
ConnCRIS for Roton Hill
The State of Connecticut also has a registry of historic buildings called ConnCRIS, which lists some of the same structures but has a different perspective.