PlayRV helps to playback with RV.
Phase render script lets you create easy wip setups. It is perfect tool for crafting work in progress or 'how it's made' renders from your script tree.
Breakdown is a nuke panel plugin with which you can create breakdowns of your nuke scripts in just a few seconds - pretty useful for creating your reel.
Remember To Save!!!!!! (BETA version)
create thumbnails out selected read nodes.
Accompanying init.py script for the RenderNode.
render out frame range with increment steps. Good for checking the overall animation of the comp without having to render every frame, so you'll get faster feedback.
You can merge read nodes into a single open exr file as channels quickly, forget about joining nodes with shuffle one by one. This tool will do it automatically.
Easy per-frame multithreaded command-line rendering for Nuke
This script makes easy to render quicktime movie for a bunch of shots.