Thank for the excellent suggestions! I'll definitely take a look.

Perhaps the key difference is that Decent Sampler allows you to create a custom GUI for your sample library. Floe does not, it's a standard, complete set of parameters that explore into the realm of sample-based-synthesis moreso than just performing virtual instruments.

I do wonder about offering an API for creating custom GUIs, but I'm unsure how it would interact with the existing firmly ingrained GUI. Maybe it would have to be a wrapper API mostly - allowing sample libraries to 'grab' into the existing set of parameters and expose and reconfigure them into custom elements.