Hah! I've been looking for something like this lately, to have some platform to integrate Hack and TypeScript into some IDE. TextAdept with LPEG has been nice, Komodo Edit/IDE would be better but their docs are out of date, Sublime Text is great but you're too limited in UIs you can build.
I had an idea of an IDE that instead of being built around a language was built around frameworks and workflows in that language, which would require deep understand of the target language. This seems like a great step in that direction, but it's a shame I can't run it on Linux :(
Mono support isn't at the top of our priority list right now. However, the Nemerle binaries work on mono, so it's possible you could build the command line compiler and sample applications under Linux. If you get it working, a pull request would be very cool!
We do have a lot of future plans for Nitra, but for now, it's worth pointing out that the products that are cross platform are Java based, while Nitra is based on .net. The project is currently Windows only.
I had an idea of an IDE that instead of being built around a language was built around frameworks and workflows in that language, which would require deep understand of the target language. This seems like a great step in that direction, but it's a shame I can't run it on Linux :(