FnM

MFnManip3D
3D manipulator function set (OpenMayaUI) (OpenMayaUI.py)
MFnMatrixAttribute
Matrix attribute function set. (OpenMaya) (OpenMaya.py)
MFnMatrixData
Matrix function set for dependency node data. (OpenMaya) (OpenMaya.py)
MFnMesh
Polygonal surface function set. (OpenMaya) (OpenMaya.py)
MFnMeshData
Mesh function set for dependency node data. (OpenMaya) (OpenMaya.py)
MFnMessageAttribute
Message attribute function set. (OpenMaya) (OpenMaya.py)
MFnMotionPath
Motion path animation function set (OpenMayaAnim) (OpenMayaAnim.py)