DotFeather uses third-party software. They are released under different licenses.
Silk.NET is a DotFeather's core dependency.
See license: https://github.com/dotnet/Silk.NET/blob/main/LICENSE.md
SixLabors.ImageSharp provides text-drawing and bitmap-loading features.
See license: https://github.com/SixLabors/ImageSharp/blob/master/LICENSE
NVorbis provides ogg-vorbis support.
See license: https://github.com/ioctlLR/NVorbis/blob/master/LICENSEs