"plugins" are commands not native generally in 2 files .js, .htm sometime with an image more .png...

that you just put inside the Moi commands folder...so one, two or three files...
then make a shortcut with _CMorph on the secound column, or Press TAb then write _Cmorph (with any capitals but without spaces)

Here for example the Cmorph by Max Smirnov from http://moi.maxsm.net/media/files/
inside the commands folder



and the result...a morphing between 3 curves (must be true curves "curvated" not straight polylines!)


For some "plugins"... so "commands" of Max Smirnov take a look at this page ;)
(in French but very illustrative ;)
http://moiscript.weebly.com/scripts-de-max-smirnov.html