superbobry

  * [1] http://wtfjs.com 
  * [2] https://github.com/jashkenas/coffee-script/wiki/List-of-languages-that-compile-to-JS

  - unicode characters (for instance you can't type in russian) -- try there http://demos.anyterm.org/shellinabox_nano
  - speed could've been better, there's a noticeable delay when running something like `mc`

  - they are either poorly or completely unsupported  
  - the code is a nightmare, badly written, undocumented