[profquail]

I've looked at ATS a few times before, and I really like all of the ideas behind it (fast, ultra-powerful typing, functional) but the syntax still seems a little clunky.

In any case the ATS compiler can emit C code, so it should be easy enough to re-implement a few bits of code at a time instead of needing to port entire projects all at once.

[doublec]

Yes, it's possible to integrate ATS generated code into a C project. ATS provides control over the names of the generated functions so you can only convert the parts you want to be verified as safe by ATS if needed.