How to download and setup OpenGL
Open terminal and run command
                                            git clone https://github.com/nekosilverfox/OpenGL.git
                                        
                                        git clone is used to create a copy or clone of OpenGL 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 OpenGL https://github.com/nekosilverfox/OpenGL/archive/master.zip
Or simply clone OpenGL with SSH
                                            [email protected]:nekosilverfox/OpenGL.git                                    
                                    If you have some problems with OpenGL
You may open issue on OpenGL support forum (system) here: https://github.com/nekosilverfox/OpenGL/issuesSimilar to OpenGL repositories
Here you may see OpenGL alternatives and analogs
gpu.js openage tiled liteide qt qutebrowser MuseScore mapbox-gl-native qTox Clementine antimony flameshot gqrx mixxx appleseed pywebview toggldesktop edb-debugger openauto CuteMarkEd LibreCAD qgroundcontrol otter-browser feedback QDarkStyleSheet stellarium hotspot GoldenCheetah SlicerGitSVNArchive qtbase