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

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NBMP
CBMPException	Exception type thrown by BMP I/O helpers
NImageLoader
CException	Exception type thrown by ImageLoader on failures
CAbstractParticleSystem	Abstract additive point‑sprite particle system with a ready‑made GL path
CCamera
CCharPosition	Character box in a bitmap atlas
CCharTex	Texture + transform bundle for a single glyph used by FontEngine
CDimensions	Simple pixel/viewport dimensions with an aspect ratio helper
CFontEngine	OpenGL-based text drawer using per-character textures (or SDFs)
CFontRenderer	CPU-side text compositor using a bitmap atlas and character boxes
CGLApp	Simple app runner with a GL context, stock shaders, and draw helpers
CGLArray
CGLBuffer
CGLDepthBuffer
CGLDepthTexture
CGLEnv	Window/context manager for OpenGL (GLFW+GLEW) or WebGL (Emscripten)
CGLException	Exception used for OpenGL-related failures
CGLFramebuffer
CGLProgram	OpenGL shader program with helpers for creation and data binding
CGLTexInfo
CGLTexture1D
CGLTexture2D
CGLTexture3D
CGLTextureCube	OpenGL cube map texture (6 faces) with convenience upload helpers
CGrid2D
CImage
CMat3t
CMat4t
CStereoMatrices	Bundle of left/right view and projection matrices for stereo
COBJFile
CProgramException	Exception thrown for program/shader I/O or linkage failures
CRandom
Cstbi_io_callbacks
CVec2t
CVec3t
CVec4t