aa_HueKey

Colour keyer written in Blink, with options to key “Hue”, or “Chroma + Luma”.
More info and download here

aa_LinkIt

This is an Input-Output link node. If the node is set to "Input", it will search and connect to the aa_LinkIt nodes that are set to "Output".
Mainly used to connect to the latest cameras, lens distortion/correction and other parts of the script without having to manually connect to them all the time.
More info and download here