Looms looks quite interesting and is similar to Coyote in a lot of ways. The exploration engine used by Coyote is based on years of investigation by Microsoft Research so it scales nicely on real world programs. I believe the Coyote team is looking into exposing the systematic exploration capabilities in a language and platform agnostic way so developers can create language-specific bindings in their language of choice and benefit from all the research done over decades. No timelines that I'm aware of but it is on the road map I believe.