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

[detail level 1234]

▼NLightbug
▼NCharacterControllerPro
▼NCore
CAnimatorLink
CCharacterActor	This class represents a character actor. It contains all the character information, collision flags, collision events, and so on. It also responsible for the execution order of everything related to the character, such as movement, rotation, teleportation, rigidbodies interactions, body size, etc. Since the character can be 2D or 3D, this abstract class must be implemented in the two formats, one for 2D and one for 3D.
CCharacterBody	This class contains all the character body properties, such as width, height, body shape, physics, etc.
CCharacterCollisionInfo	This struct contains all the character info related to collision, that is, collision flags and external components. All the internal fields are updated frame by frame, and can can be accessed by using public properties from the CharacterActor component.
CCharacterCollisions
CCharacterCollisions2D
CCharacterCollisions3D
CCharacterConstants	This class contain all the constants used for collision detection, steps detection, ground probing, etc. All the values were carefully chosen, this means that it is not recommended to modify these values at all, however if you need to do it do so at your own risk (make a backup before).
CCharacterDebug	This class is used for debug purposes, mainly to print information on screen about the collision flags, certain values and/or triggering events.
CCharacterDetector
CCharacterGraphics	The root abstract class for all the graphics-based components.
CCharacterGraphics2DRotator	This component can be used to rotate a 2D character based on its forward direction. For 2D, characters usually have its forward direction pointing towards Vector3.forward (or negtive).
CCharacterGraphicsRootController	This component is responsible for smoothing out the graphics-related elements (under the root object) based on the character movement and rotation.
CCharacterGraphicsScaler	This component can be used to make a Transform change its scale based on the character actor height.
CCharacterRotationLerper	This component can be used to smooth out the graphics object rotation.
CCharacterSpriteRotator	This component can be used to rotate a 2D sprite based on the character forward direction.
CCharacterStepLerper	This component is responsible for smoothing out the graphics-related elements (under the root object) based on the character movement (CharacterActor). It allows you to modify the position and rotation accordingly, producing a great end result.
CCollisionInfo	This class contains the collision information gathered from of all the different physics queries (raycast, capsuleCast, etc). This information is very important for movement prediction.
CDynamicOneWayPlatform
CPhysicsActor	A physics-based actor that represents a custom 2D/3D interpolated rigidbody.
CPhysicsActorSync	This component is responsible for initializing the interpolation data associated with the physics actor.
CVerticalAlignmentSettings
▼NImplementation
CBoolAction	This struct contains all the button states, which are updated frame by frame.
CCharacterActions	This struct contains all the inputs actions available for the character to interact with.
CCharacterActionsAsset	This ScriptableObject contains all the names used as input actions by the human brain. The name of the action will matters depending on the input handler used.
CCharacterAIAction	This class represents a sequence action, executed by the AI brain in sequence behaviour mode.
CCharacterAIBehaviour
CCharacterBrain	This class is responsable for detecting inputs and managing character actions.
CCharacterState	This class represents a state, that is, a basic element used by the character state controller (finite state machine).
CCharacterStateController	This class handles all the involved states from the character, allowing an organized execution of events. It also contains extra information that may be required and shared between all the states.
CFloatAction
CInputAxes	This class reads the actions of a 2D UI joystick and then sends the values to a mobile input component.
CInputButton	This class reads the actions of a 2D UI button and then sends the states flags to a mobile input component.
CInputHandler	This abstract class contains all the input methods that are used by the character brain. This is the base class for all the input detection methods available.
CInputHandlerSettings
CIUIAction
CIUIBoolAction
CIUIFloatAction
CIUIVector2Action
CIUpdatable	Interface used for objects that need to be updated in a frame by frame basis.
CMovementReferenceParameters
CUIInputHandler	This input handler implements the input detection for UI elements (mobile UI).
CUnityInputHandler	This input handler implements the input detection following the Unity's Input Manager convention. This scheme is used for desktop games.
CVector2Action
▼NUtilities
CActionAttribute
CBooleanButtonAttribute
CBoxColliderComponent2D	This component represents a capsule collider in a 2D world.
CBoxColliderComponent3D	This component represents a capsule collider in a 2D world.
CBreakVector2Attribute
CBreakVector3Attribute
CCapsuleColliderComponent2D	This component represents a capsule collider in a 2D world.
CCapsuleColliderComponent3D	This component represents a capsule collider in a 3D world.
CColliderComponent	This component is an encapsulation of the Collider and Collider2D components, containing the most commonly used properties and methods from these components.
CColliderComponent2D	An implementation of a ColliderComponent for 2D colliders.
CColliderComponent3D	An implementation of a ColliderComponent for 3D colliders.
CConditionAttribute
CContact	Struct that contains the information of the contact, gathered from the collision message ("enter" and "stay").
CCustomClassDrawer
CCustomHeaderAttribute
CExpandAttribute
CHelpBoxAttribute
CHitInfo
CHitInfoFilter
CPhysicsComponent	This component offers a set of useful functionalities for 2D and 3D physics.
CPhysicsComponent2D	An implementation of a PhysicsComponent for 2D physics.
CPhysicsComponent3D	An implementation of a PhysicsComponent for 3D physics.
CReadOnlyAttribute
CRigidbodyComponent	This component is a wrapper for the Rigidbody and Rigidbody2D components, containing not only the most commonly used properties and methods, but also some extra features.
CRigidbodyComponent2D	An implementation of RigidbodyComponent for 2D rigidbodies.
CRigidbodyComponent3D	An implementation of RigidbodyComponent for 3D rigidbodies.
CSphereColliderComponent2D	This component represents a sphere collider in a 2D world (better known as a circle).
CSphereColliderComponent3D	This component represents a sphere collider in a 3D world.
CTrigger	Struct that contains the information of the contact, gathered from the collision message ("enter" and "stay").