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

[detail level 1234]

april
Gui
CmdLog	Form that allows interfacing with april-cmd library
DNAEditorDlg	Dialog to create or edit a kind
Dock	Represents the base class for a docking panel
DockCmdLog_p	Implementation class
DockCmdLog	Command and log dock panel
DockCrtSel_p	Implementation class
DockCrtSel	Properties of current selection
DockIds_p	Internal tree entry
DockIds	The list of IDs
DockTree_p	Tree component
DockTree	The tree of the world listing all objects
DockWorld_p	Private data for worlds
DockWorld	Informations about the world
MW	Form that represents the main widget for the application
NewActorDlg	Dialog to add a new actor
NewWorldDlg	Dialog to create a new world
GeneralData	Data for general tab
PlginEntry	Entry in the list of plug-ins
PluginsDlg	Dialog to list plugins
SceneViewer	An enhanced scene viewer based on QGraphicsView
AGui	An Actor with gui characteristics
AGui2D	An Actor with 2D position
AGui3D	An Actor with 3D position
AQScene	An actor in a QGraphicsScene
WorldQScene	A world in a QGraphicsScene
WqsTAuto	A world in a QGraphicsScene with a timer
AbstractApril	Main class for abstracta application
AprilLibrary	Represents the root structure for the library
LibProps	Entire set of properties
AprilModule	Base class for all modules
AaToken	Token descriptor (string is not contained inside)
AaTkString	Tokenised string; contains the string itself and the list of tokens
AprilTokenizer	A class capable of splitting strings into tokens
CommandMap	Class capable of storing a list of commands and associated callbacks
AModActor	Module that provides commands related to actors
AModActuator	Module that provides commands related to Actuators
AModApril	Module that provides commands related to introspection
AModBrain	Module that provides commands related to brains
AModDNA	Module that provides commands related to DNA
AModEvent	Module that provides commands related to events
AModId	Module that provides commands related to IDs
AModPlugIns	Module that provides commands related to plug-ins
AModReflex	Module that provides commands related to reflexes
AModSensor	Module that provides commands related to sensors
AModWorld	Module that provides commands related to worlds
Actor	An active ocupier of the world
ActorComp	Base class for components of an Actor
ActorFactory	Factory class for agents
Actuator	Base class for actuators
ActuatorFactory	Factory class for actuators
AOutput	Manages the output in abstracta application
Brain	Base class for a brain
BrainFactory	Base class for brain factories
Component	Base class for various components
Director	Manages the runnings of a world
DNA	Represents persistent read-only storage space for Actors
InitData	Initialisation data
Partition	Entry in the list of partitions
DNAView	Provides access to an ID tagged portion of the DNA
EventData	A packet in an EventLine
EventFactory	Factory class for events
EventLine	Buffers between events and sensors
EventSource	An event is a way to stimulate agents from a world
Factory	Base class for factory classes
GenericActorFactory	A generic actor factory
Reflex	A base class for a reflex
ReflexFactory	Base class for reflex factories
Sensor	Base class for sensors
SensorFactory	Factory class for sensors
UniqueId	Provides support for unique identificators
World	A world hosts agents, events, environment
WorldFactory	Class capable of creating worlds
ABOX2D	Represents a rectangle that is aligned with the axis
ABOX3D	An axis aligned rectangle with height
AprilPluginInterf	Interface for plugins used with April
AprilPluginLoader	Class to load and manage plug-ins
IdEntry	Item in a list holding an ID for future use
P2D	Point in 2D space
P3D	Point in 3D space
WQS_Unit	Item for scene that represents the origin and axis directions