com.badlogic.gdx
Interfaces 
Application
ApplicationListener
Audio
Files
Graphics
Input
Input.TextInputListener
InputProcessor
Preferences
Screen
Classes 
ApplicationAdapter
Game
Gdx
Graphics.BufferFormat
Graphics.DisplayMode
Input.Buttons
Input.Keys
InputAdapter
InputMultiplexer
Version
Enums 
Application.ApplicationType
Files.FileType
Graphics.GraphicsType
Input.Orientation
Input.Peripheral