nitro
                                Powerful and flexible node editor that facilitates building complex combinations of various image processing techniques.
                            
                        How to download and setup nitro
Open terminal and run command
                                            git clone https://github.com/BugelNiels/nitro.git
                                        
                                        git clone is used to create a copy or clone of nitro repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with nitro https://github.com/BugelNiels/nitro/archive/master.zip
Or simply clone nitro with SSH
                                            [email protected]:BugelNiels/nitro.git                                    
                                    If you have some problems with nitro
You may open issue on nitro support forum (system) here: https://github.com/BugelNiels/nitro/issuesSimilar to nitro repositories
Here you may see nitro alternatives and analogs
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