I try to keep track of all those platforms, and you're right, it's hard. My findings are summarized at http://www.mobilechameleon.com/ (hosted for free by Weebly, a YC alum).
Well, it appears there are only 2 in the most interesting category: Titanium and NativeScript.
My sense is that it's surprising we still don't have a decent way to build native apps in JavaScript. Titanium looked like the answer but I have trouble following where they're going. NativeScript looks promising so far but cannot figure out the tie-in to Telerik.
Btw, you may need an addition for Swift, I believe there is at least one cross platform tool for it now.