Lightspark is another open-source Flash Player for Linux.Compared to Adobe Flash Player,Gnash and swfdec,Light also has following features:

* JIT compilation of ActionScript to native x86 bytecode using LLVM
* Hardware accelerated rendering using OpenGL Shaders (GLSL)
* Very good and robust support for current-generation ActionScript 3
* A new, clean, codebase exploiting multithreading and optimized for modern hardware. Designed from scratch after the official Flash documentation was released.

The current version is still an alpha release,but actually the core part of Lightspark is mostly stable now. Code is not ready for general use yet, as it is not robust enough when facing unexpected conditions.

Ubuntu users can install and test the new Flash Player from Lightspark repository:

sudo add-apt-repository ppa:sssup/sssup-ppa
sudo aptitude update
sudo aptitude install lightspark

Useful links:
Source Page: