Ωmega

The Omega interpreter is a strict pure functional programming interpreter similar to the Hugs Haskell interpreter. The syntax closely resembles that of Haskell but with important differences: Other differences are documented in the Omega user guide.
 * Omega is strict (Hugs is lazy);
 * Ability to introduce new kinds;
 * Allows writing of functions at the type level.

Omega was developed by Prof. Tim Sheard of Portland State University's Computer Science Department as a language with an infinite hierarchy of computational levels (value, type, kind, sort, etc.). The underlying concept is that data, and functions manipulating data, can be introduced at any level.