Working list....
Primitives (Number, Integer (16, 32, 64), Float(32, 64), Uri, ..)
Collections (List, Set, Map<T, T>)
Units (SI...)
Numerics (Vector2, Vector3, Matrix4x4, ...)
Geometry (Polygon, ...)
Physics
Drawing (Brush, Canvas)
Time (Date, DateTime, TimeZone, ...)
Text
IO (Pipe, Blob)
Channels
Networking (IPAddress)
HTTP
JSON