FLstudio for me.
This is all plugins that are not native to FLstudio, such as Sylenth1, Spire, TruePianos, just to name a few.
The other problem is that I'm not able to load in plugins either in my FL ...
FL, open FL again and load that project I just saved. During the loading process some plugins just won't open, some times they do, some times they don't. When they don't is says 'This Plugin failed to load ...