MinJCompiler is a project mainly written in F# and OBJECTIVE-C, it's free.
The F# MinJ Compiler is a university project for the Compiler Design class at Concordia University (COMP 442). The compiler's source language is a programming language called MinJ designed by professor J. Opatrny.
While this is not really a useful product in itself, it could serve as an interesting reference for anyone that wants to explore possible ways of writing compilers in F#.