I think I’m about to set a new personal record for lowest number of posts in a given year. Is it really October already?
Well, at least I’m working and on a pretty interesting project from both a mathematical and programming perspective, so I should be thankful for that.
I am, however, still interested in doing something new and interesting this year and I think it will be along the lines of a computational geometry library and/or version of the Freehand Drawing Library in Javascript. The CG library is likely to be released through a series of posts in an open-source context similar to the TechNotes series I did in Actionscript for Flash/Flex programmers. The JS FDL is intended for clients doing mobile development in an HTML/JS environment. Okay, it’s mostly for me to have fun – I confess! However, an extra license or two never hurt anyone 🙂
To this end, I’m currently looking into both Typescript and Jangaroo. Coffeescript is on the list as well, but I’m really looking to get back into Visual Studio and C++/C# development, so Typescript has some natural appeal. Perhaps sufficient time will arise to deep-dive into all three?
I guess we’ll have to wait and see. Sorry again for the waiting part. This has been a strange (but fortunately very profitable) year.
The Algorithmist 
What about haxe? It has a much longer history on compiling to JS. And I think its C++ and C# targets would interest you too.
I’ve looked at it and it’s on the list, but there have been issues in the past with the generated JS. Right now, especially with debugging, Jangaroo looks like a better AS3 -> JS alternative. thx. For C# or C++, I’d rather code directly 🙂