Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12345]

pyramidworks
collision
CollisionClass
CollisionLogic
CollisionManager
CollisionObject
GenericCollisionLogic
geometry
Circle
ConvexPolygon
GeometricShape
Rect
ugdk
action
AnimationManager
AnimationFrame
Animation
AnimationSet
Entity
GenericTask
Observer
Scene	A game scene, or screen
Task
base
GenericContainer
GenericContainer< T , T (*)(const std::string &)>
ResourceContainerBase
ResourceContainer
ResourceContainer< T * >
ResourceManager
enums
mirroraxis
gdd
AbstractLoader
CachedLoader
LoadError
DescriptionProtocol
ParseStatus
Parser
Reader
SimpleLoader
graphic
Shape
SolidRectangle
Sprite
Text
TexturedRectangle
Drawable
Font
Light
Modifier
Node
SpritesheetData	Container for an unoptimized FixedSpritesheet data. May freely add new frames
SpritesheetFrame
Spritesheet
TextManager
Texture
VideoManager
ikdtree
IntervalKDTree
Box
Item
Node
input
InputManager
math
Integer2D
script
lua
AuxLib
BaseGear
InternalSafeCall
BootstrapGear
DataGear
Constant	Represents a constant value from the Lua library
err
gc
LuaData
LuaWrapper
State
python
PythonData
PythonWrapper
BaseProxy
LangWrapper
InheritableLangWrapper	Wraps a scripting language
Module
ScriptManager
VirtualType
TypeRegistry
VirtualData	Abstract class representing virtual script data
VirtualObj	A proxy class wich represents virtual objects from scripting languages
Bind
TempList
VirtualPrimitive
VirtualPrimitive< T * >
time
TimeAccumulator
TimeManager
ui
Button
Menu
UIElement
util
IDGenerator
Uncopyable
AudioManager
Music
Sample
Configuration
Engine	The game engine. Manages scenes, time, and the Audio, Video, Input and Text managers
Color
Frame	Represents a frame on the screen or an image
Vector2D
AnimationProtocol
Language
LanguageManager
LanguageWord
PathManager
Box
DescriptionProtocol
InheritableLangWrapper
Item
Node
PyHeapTypeObject
RotatedRect
swig_cast_info
swig_const_info
swig_lua_attribute
swig_lua_class
swig_lua_const_info
swig_lua_method
swig_lua_rawdata
swig_lua_userdata
swig_lua_var_info
swig_module_info
swig_type_info
SwigPyClientData
SwigPyObject
SwigPyPacked