nik4nix
    
            
                
                    Nik plugins on Ubuntu standalone or with Picasa3
                
            
             
            
             
            
        
            Main idea here is that you can use Nik Plugins stand-alone without officially supported 3rd party host application (Lightroom, Photoshop, Spark, Portfolio). On Windows or Linux.
Source code can be compiled natively for Linux or for Windows with Lazarus IDE. 
The program is dedicated to Ubuntu users, where you can install Nik Collection using wine. On Ubuntu you can either use native Linux version, or native Windows version running via wine. In fact, currently the latter is recommended...