Color Difference Matte keyer
This tool will help with Despill and edge blending with the background plate.
Create 3D gradient mattes in any direction based on a position image
Originally designed to help discover keyable channels for trickier shots, this gizmo creates a colorspace contact sheet.
This tool allows users to quickly and easily create green or blue screen clean plate/defect maps using the ibk_colour stack method. It is a straightforward process that is completed in a few steps. Backup download link: https://github.com/shubhamsonivfx/IBK-Color-Master/releases/
depth keyer - single or dual directions ( replacement for ZSlice )
A much more powerful and intuitive difference keyer than the stock one in Nuke
Unspill technique by good old Steve Wright put into a nice little gizmo.
Despill gizmo based on background luminance and chroma with much more useful extra features.
Rebuilt Nuke Keyer. Non-clamped and with LUT color controls.