This is an overview of the gizmos included in the open source package released by Spin VFX. github.com/SpinVFX/spin_nuke_gizmos/releases
This doesn't go very in depth but looks at an example for each and every tool.
Noise3D : 00:50
Morph_Dissolve: 16:34 (See erwanleroy.com/morph_dissolve-gizmo-for-nuke/)