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

[detail level 1234]

src
libtcod
sdl2
event.h	SDL2/libtcod event compatibility tools
bresenham.h	Bresenham line module
bresenham.hpp	Bresenham line module
bsp.h	Binary space partitioning module
bsp.hpp	Binary space partitioning module
color.h	Color handling module
color.hpp	Color handling module
config.h	Libtcod config header
console.h	Various console functions
console.hpp	C++ console module
console_drawing.h	Console simple drawing module
console_etc.h	Miscellaneous deprecated functions
console_init.h	Deprecated root console initialization
console_printing.h	Console string printing module
console_printing.hpp	Console string printing module
console_rexpaint.h	REXPaint support
console_rexpaint.hpp	REXPaint support
console_types.h	C types for console functions
console_types.hpp	C++ types for console functions
context.h	Libtcod display management context
context.hpp	Libtcod display management context
context_init.h	Context initialization module
context_viewport.h	Context viewport options
error.h	Error handling module
error.hpp	Error handling module
fov.h	Field-of-view module
fov.hpp	Field-of-view module
fov_types.h	Field-of-view types
globals.h	Manage deprecated global variables
heapq.h	Internal heap queue module
heightmap.h	Terrain heightmap module
heightmap.hpp	Terrain heightmap module
image.h	Image handling module
image.hpp	Image handling module
lex.h	Internal tokenizer module
lex.hpp	Internal tokenizer module
libtcod.h
libtcod.hpp
list.h	Deprecated libtcod list module
list.hpp	Deprecated TCODList class
logging.h	Internal libtcod logging module
matrix.hpp
mersenne.h	Random number generator functions
mersenne.hpp	Random number generator C++ module
mersenne_types.h	Random number generator types
mouse.h	Deprecated mouse functions
mouse.hpp	Deprecated mouse functions
mouse_types.h	Mouse state provided by the libtcod event system
namegen.h	Name generator module
namegen.hpp	Name generator module
noise.h	Texture noise generator module
noise.hpp	Texture noise generator module
noise_defaults.h	Noise default parameters
parser.h	Libtcod config parser
parser.hpp	Libtcod config parser
path.h	Libtcod A* and Dijkstra pathfinders
path.hpp	Libtcod A* and Dijkstra pathfinders
pathfinder.h
pathfinder_frontier.h
portability.h	Miscellaneous tools needed across platforms
random.h	Experimental random number generators
renderer_sdl2.h	Low level SDL2 tileset rendering
renderer_xterm.h
sys.h	Deprecated low-level functions
sys.hpp	Deprecated low-level functions
tileset.h	Tileset module
tileset.hpp	Tileset module
tileset_bdf.h	Load BDF fonts as tilesets
tileset_bdf.hpp	Load BDF fonts as tilesets
tileset_fallback.h	Last resort local font module
tileset_fallback.hpp	Last resort local font module
tileset_render.h	Tileset software renderer
tileset_truetype.h
timer.h
timer.hpp	SDL-based frame timing addon
tree.h	Internal tree container
tree.hpp	Internal tree container
txtfield.h	Text pad interface
txtfield.hpp	Text pad interface
utility.h	Common C macro definitions
version.h	Libtcod version informaiton
wrappers.h	Deprecated language binding wrapper functions
zip.h	Deprecated serialization and compression module
zip.hpp	Deprecated serialization and compression module
libtcod.h
libtcod.hpp