Here is a list of all files with brief descriptions:

CompactHeightfield.cpp
CompactHeightfield.h
DetourAlloc.cpp
DetourAlloc.h
DetourAssert.h
DetourCommon.cpp
DetourCommon.h
DetourCrowd.cpp
DetourCrowd.h
DetourLocalBoundary.cpp
DetourLocalBoundary.h
DetourMath.h
DetourNavMesh.cpp
DetourNavMesh.h
DetourNavMeshBuilder.cpp
DetourNavMeshBuilder.h
DetourNavMeshQuery.cpp
DetourNavMeshQuery.h
DetourNode.cpp
DetourNode.h
DetourObstacleAvoidance.cpp
DetourObstacleAvoidance.h
DetourPathCorridor.cpp
DetourPathCorridor.h
DetourPathQueue.cpp
DetourPathQueue.h
DetourProximityGrid.cpp
DetourProximityGrid.h
DetourStatus.h
DetourTileCache.cpp
DetourTileCache.h
DetourTileCacheBuilder.cpp
DetourTileCacheBuilder.h
DetourTypes.h
Heightfield.h
Recast.cpp
Recast.h
RecastAlloc.cpp
RecastAlloc.h
RecastArea.cpp
RecastAssert.h
RecastContour.cpp
RecastFilter.cpp
RecastLayers.cpp
RecastMesh.cpp
RecastMeshDetail.cpp
RecastRasterization.cpp
RecastRegion.cpp
Util.h
Vector.h