OpenVDB  9.0.1
Class List
Here are the classes, structs, unions and interfaces with brief descriptions:
[detail level 123456]
 Ncxx14
 NGU_VDBPointToolsInternal
 Nhoudini_utils
 Nnanovdb
 Nopenvdb
 Nopenvdb_houdini
 NOSN
 Nstd
 CApplyFunc
 CAXLTYPE
 CAXSTYPE
 Ccnanovdb_coord
 Ccnanovdb_gridblindmetadata
 Ccnanovdb_griddata
 Ccnanovdb_map
 Ccnanovdb_mask3
 Ccnanovdb_mask4
 Ccnanovdb_mask5
 Ccnanovdb_node0F
 Ccnanovdb_node0F3
 Ccnanovdb_node1F
 Ccnanovdb_node1F3
 Ccnanovdb_node2F
 Ccnanovdb_node2F3
 Ccnanovdb_readaccessor
 Ccnanovdb_rootdata_tileF
 Ccnanovdb_rootdata_tileF3
 Ccnanovdb_rootdataF
 Ccnanovdb_rootdataF3
 Ccnanovdb_stencil1F
 Ccnanovdb_stencil1F3
 Ccnanovdb_tileentryF
 Ccnanovdb_tileentryF3
 Ccnanovdb_treedata
 Ccnanovdb_Vec3F
 CCompositeOp
 CFilterTypeSelectively extract and filter point data using a custom filter operator
 CGU_VDBPointListHoudini point attribute wrapper
 CMeshDataAdapterConvert polygonal meshes that consist of quads and/or triangles into signed or unsigned distance field volumes
 CParticleArrayPartition particles and performs range and nearest-neighbor searches
 Cpnanovdb_grid_handle_t
 Cpnanovdb_grid_t
 Cpnanovdb_grid_type_constants_t
 Cpnanovdb_gridblindmetadata_handle_t
 Cpnanovdb_gridblindmetadata_t
 Cpnanovdb_leaf_handle_t
 Cpnanovdb_leaf_t
 Cpnanovdb_lower_handle_t
 Cpnanovdb_lower_t
 Cpnanovdb_map_handle_t
 Cpnanovdb_map_t
 Cpnanovdb_readaccessor_t
 Cpnanovdb_root_handle_t
 Cpnanovdb_root_t
 Cpnanovdb_root_tile_handle_t
 Cpnanovdb_root_tile_t
 Cpnanovdb_tree_handle_t
 Cpnanovdb_tree_t
 Cpnanovdb_upper_handle_t
 Cpnanovdb_upper_t
 CPointArray
 CPointArrayPartitions points into BucketLog2Dim aligned buckets using a parallel radix-based sorting algorithm
 CRayGenOp
 CSOP_VDBCacheOptionsSOP_NodeCacheOptions subclass that adds methods specific to SOP_NodeVDB
 CTestLeafIO