Here is a list of all files with brief descriptions:

AABB.h
broadphase.h
broadphase_bruteforce.h
broadphase_dynamic_AABB_tree.h
broadphase_dynamic_AABB_tree_array.h
broadphase_interval_tree.h
broadphase_SaP.h
broadphase_spatialhash.h
broadphase_spatialhash.hxx
broadphase_SSaP.h
BV.h
BV_fitter.h
BV_node.h
BV_splitter.h
BVH_front.h
BVH_internal.h
BVH_model.h
BVH_utility.h
classifier.h
collision.h
collision_data.h
collision_func_matrix.h
collision_node.h
collision_object.h
conservative_advancement.h
continuous_collision.h
data_types.h
deprecated.h
distance.h
include/hpp/fcl/distance_func_matrix.h
src/distance_func_matrix.h
doc.hh
exception.h
fwd.hh
geometric_shape_to_BVH_model.h
geometric_shapes.h
geometric_shapes_utility.h
gjk.h
gjk_libccd.h
greedy_kcenters.h
hash.h
hierarchy_tree.h
hierarchy_tree.hxx
interpolation.h
interpolation_factory.h
interpolation_linear.h
intersect.h
interval.h
interval_matrix.h
interval_tree.h
interval_vector.h
joint.h
joint_config.h
kDOP.h
kIOS.h
link.h
math_details.h
math_simd_details.h
matrix_3f.h
model.h
model_config.h
morton.h
motion.h
motion_base.h
narrowphase.h
nearest_neighbors.h
nearest_neighbors_flann.h
nearest_neighbors_GNAT.h
nearest_neighbors_linear.h
nearest_neighbors_sqrtapprox.h
include/hpp/fcl/BV/OBB.h
src/BV/OBB.h
OBBRSS.h
octree.h
profile.h
RSS.h
sampling.h
simd_intersect.h
simplex.h
support.h
taylor_matrix.h
taylor_model.h
taylor_vector.h
transform.h
traversal_node_base.h
traversal_node_bvh_shape.h
traversal_node_bvhs.h
traversal_node_octree.h
traversal_node_setup.h
traversal_node_shapes.h
traversal_recurse.h
vec_3f.h
vec_nf.h