Here is a list of all documented files with brief descriptions:

arealight.cpp
av.cpp
bbox.h
bitmap.cpp
bitmap.h
block.cpp
block.h
bsdf.h
bvh.cpp
bvh.h
camera.h
checkerboard.cpp
chi2test.cpp
color.h
common.cpp
common.h
consttexture.cpp
dielectric.cpp
diffuse.cpp
direct.cpp
direct_ems.cpp
direct_mats.cpp
direct_mis.cpp
dpdf.h
emitter.h
frame.h
gui.cpp
gui.h
hdrToLdr.cpp
independent.cpp
integrator.h
kdtree.h
main.cpp
mesh.cpp
mesh.h
microfacet.cpp
mirror.cpp
normals.cpp
obj.cpp
object.cpp
object.h
parser.cpp
parser.h
path_mats.cpp
path_mis.cpp
perspective.cpp
photon.cpp
photon.h
photonmapper.cpp
pointlight.cpp
proplist.cpp
proplist.h
ray.h
render.cpp
render.h
rfilter.cpp
rfilter.h
sampler.h
scene.cpp
scene.h
shape.cpp
shape.h
sphere.cpp
texture.h
timer.h
transform.h
ttest.cpp
vector.h
warp.cpp
warp.h
warptest.cpp