Visi.io is a language, runtime, and development environment written in Haskell (and a little Objective-C) that runs on the iPad and in the Cloud. Visi.io and Visi.Pro will make writing beautiful, interactive iPad facing, Cloud powered apps super simple.
And the GitHub page says:
Visi is an open source language that blends concepts from spreadsheets, scripting languages, functional languages such as Haskell and OCaml, and other systems. The goal of Visi is to be accessible for Excel power users, yet be “correct” such that runnable code should be substantially bug-free.