phc-adt (racket): Algebraic Data Types for Typed/Racket, with features tailored to compiler writing. The data types do not have to be declared before they are used, like prefab structs and symbols. Behind the scenes, this library remembers all the data types in a file, and uses it to implicitly pre-declare them. Mostly stable, although some things may change a bit in the future.
Keywords: data|typed-racket|algebraic-data-types|racket-library