Plugins
A .plugin
file is a C++ compiled shared library, similar to a .dll file. Such plugins are a way to create new Fusion 3rd party nodes (aka Tools).
Plugins are Fusion Tools written using the FusionSDK. Note that Plugins do work only in the payed Versions of BMD's Software, so you need either Fusion Studio, or DaVinci Resolve Studio. An alternative to native Fusion Plugins are OpenFX Plugins and Fuse.