FLStudio includes a wide range of plugins: generators, tools and effects. However most of these are FLStudio format only. Which means they only work in FLStudio.
If they are available as a VST or AU format ...
FLStudio 12 using the Fruity Soundfont Player. I just recently got FLStudio 20 on a new computer, and went to go edit a song that used it. All of a sudden I'm being told it's a demo ...