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).

What a nice site. A small but useful curation presented in a very simple and clean way.

Btw, you may need an addition for Swift, I believe there is at least one cross platform tool for it now.

Good idea. I added a page at http://www.mobilechameleon.com/toolkits-using-swift.html

Holy shit I never realized how many hybrid app frameworks there are. Nice site by the way.

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.

Because many of us only touch it in the browser?

There is also Tabris.js

Oh, nice; I added it to my site.

I doubt this or other solutions built by a for-profit businesses in a seemingly open fashion will go far. Facebook is a different case and having some hands on experience with current players, believe them coming up with a better engineered solution.

As for the general concerns, i can add that it's not just 'i know JavaScript and don't want to learn anything else', but rather having some common ground while building products/services on the web. It's probably ok for a big company to support say 3 platforms (web, android & ios), but hardly an option for a small startup or a one man band. Now i'd be more than happy to just stick with web, or at least the solutions bringing the others closer to it (that's by the way where Titanium is pretty weak).

There are remarkably few where preferred_language=JavaScript. This, Titanium and perhaps React.