NodeCustomBuilder is a Blender addon for saving node trees and calling them back into other projects. Once you've built a node setup you like, you can store it and reuse it with a single mouse click. It saves more than the nodes themselves — the settings of each individual node are stored too, so a preset returns complete. The addon works in the shader and compositing editors, and geometry nodes are supported.
Presets can be organized into your own folders, and the addon ships in English and Chinese language versions. It is released under the GPL license, and the developer states that all future updates are free. An online library was noted as in progress at nodecustombuilder.com, and documentation is included.
It stands out in the superhive library as a straightforward way to reuse node work across Blender projects rather than rebuilding trees by hand. A demo video is available for a closer look.