Namespace List
Here is a list of all documented namespaces with brief descriptions:

OpenMesh | Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels and mesh traits
Attributes | This namespace holds per item attributes like normal/color
Concepts | Descriptions of the concepts used in OpenMesh
Decimater | Software related to mesh decimation
GenProg | Utilities for generative programming
IO | This namespace contains functions for reading and writing polygonal meshes and a list of supported file formats
Iterators | Contains all mesh iterators and circulators
Kernel_OSG | In this namespace resides the OpenSG integration of OpenMesh
FP | OpenSG Face Properties Adaptors
VP | OpenSG Vertex Properties Adaptors
Subdivider |
Adaptive | Software related to adaptive subdivision of meshes
Uniform | Software related to uniform subdivision of meshes
Utils | Collection of little utility classes and helpers
VDPM | Software related to view dependent progressive meshes