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

aba-derivatives.hpp
aba.hpp
act-on-set.hpp
container/aligned-vector.hpp
serialization/aligned-vector.hpp
archive.hpp
axis-label.hpp
binary-op.hpp
boost-container-limits.hpp
cartesian-axis.hpp
cartesian-product-variant.hpp
cartesian-product.hpp
autodiff/casadi.hpp
math/casadi.hpp
center-of-mass-derivatives.hpp
center-of-mass.hpp
centroidal-derivatives.hpp
centroidal.hpp
check.hpp
cholesky.hpp
code-generator-algo.hpp
code-generator-base.hpp
comparison-operators.hpp
compute-all-terms.hpp
constraint-base.hpp
constraint-generic.hpp
constraint.hpp
contact-dynamics.hpp
copy.hpp
autodiff/cppad.hpp
math/cppad.hpp
codegen/cppadcg.hpp
math/cppadcg.hpp
crba.hpp
data.hpp
default-check.hpp
deprecated-macros.hpp
deprecated-namespaces.hpp
deprecation.hpp
dynamics.hpp
eigen-fix.hpp
eigen-macros.hpp
eigen.hpp
energy.hpp
explog-quaternion.hpp
explog.hpp
fcl-pinocchio-conversions.hpp
fcl.hpp
file-explorer.hpp
force-base.hpp
force-dense.hpp
force-ref.hpp
force-set.hpp
force-tpl.hpp
serialization/force.hpp
spatial/force.hpp
multibody/frame.hpp
serialization/frame.hpp
frames.hpp
fusion.hpp
fwd.hpp
math/fwd.hpp
multibody/fwd.hpp
multibody/joint/fwd.hpp
multibody/liegroup/fwd.hpp
serialization/fwd.hpp
spatial/fwd.hpp
algorithm/geometry.hpp
multibody/geometry.hpp
serialization/inertia.hpp
spatial/inertia.hpp
jacobian.hpp
joint-base.hpp
joint-basic-visitors.hpp
joint-binary-visitor.hpp
joint-collection.hpp
joint-common-operations.hpp
joint-composite.hpp
joint-configuration.hpp
joint-free-flyer.hpp
joint-generic.hpp
joint-mimic.hpp
joint-planar.hpp
joint-prismatic-unaligned.hpp
joint-prismatic.hpp
joint-revolute-unaligned.hpp
joint-revolute-unbounded-unaligned.hpp
joint-revolute-unbounded.hpp
joint-revolute.hpp
joint-spherical-ZYX.hpp
joint-spherical.hpp
joint-translation.hpp
joint-unary-visitor.hpp
multibody/joint/joints.hpp
serialization/joints.hpp
kinematics-derivatives.hpp
kinematics.hpp
liegroup-algo.hpp
liegroup-base.hpp
liegroup-collection.hpp
liegroup-generic.hpp
liegroup-variant-visitors.hpp
liegroup-variant.hpp
liegroup.hpp
lua.cpp
lua.hpp
lua_tables.cpp
lua_tables.hpp
macros.hpp
matrix-block.hpp
matrix.hpp
algorithm/model.hpp
multibody/model.hpp
serialization/model.hpp
motion-base.hpp
motion-dense.hpp
motion-ref.hpp
motion-tpl.hpp
motion-zero.hpp
serialization/motion.hpp
spatial/motion.hpp
quaternion.hpp
regressor.hpp
rnea-derivatives.hpp
rnea.hpp
rotation.hpp
sample-models.hpp
se3-base.hpp
se3-tpl.hpp
serialization/se3.hpp
spatial/se3.hpp
serializable.hpp
sincos.hpp
skew.hpp
spatial-axis.hpp
spatial.hpp
special-euclidean.hpp
special-orthogonal.hpp
srdf.hpp
static-if.hpp
string-generator.hpp
serialization/symmetric3.hpp
spatial/symmetric3.hpp
taylor-expansion.hpp
tensor.hpp
timer.hpp
types.hpp
unary-op.hpp
urdf.hpp
urdf/utils.hpp
utils.hpp
vector-space.hpp
vector.hpp
version.hpp
visitor.hpp