I almost learned programming and OOP basic concepts with ActionScript 3 on the Flash Platform years ago. Some time has passed since then; I'm not a professional programmer, but I have written code in PHP, Fortran, and now Python. But, lately, I have missed ActionScript 3 OOP implementation, static typing and, I confess, curly braces.
As Flash platform is slowly dying nowadays, I'm looking for an Open Sourced programming language similar to ActionScript 3 (though I've found a way to use ActionScript 3, see Edit 3). I've read about Java, which is the most similar one I found, but actually is the only one it doesn't interest me (I started to hate it after bad experiences with web applets).
Edit: Added EcmaScript to the title and the tags; I think that is what I am looking for.
Edit2: I read Java can be natively compiled. That would make me hate it a bit less.
Edit3: For what it's worth, Tamarin aims to be "a high-performance, open source implementation of the ActionScript™ 3 language". It's developed by Mozilla and it is being used in the Adobe® Flash® Player. Besides, redtamarin, based on Tamarin, "allow to run AS3 code on the command-line".