[omniscient_oce]

I'm confused. It says it costs 49 euros to download on the page at the bottom.

[vantagedesign]

The normal version is free, which includess a lot of components. If you want more, there's a Pro version which is paid. But the free version is open source and already quite extensive to use :)

[Etheryte]

Oh, I missed that bit entirely when scrolling the page. Apparently there's a free version and a paid version, the latter having more stuff.