[Q] Root apps

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what does Chainfire 3D and Busybox do?

chainfire3d:- a great app created by chaifire, its work is to interact with gpu and software to make them compatible with each other, some games are created for quallcomm processor but chainfire3d allow the user to run that game in hummingbird processor by intercepting commands with gpu an example is Bruce lee DW, desert winds

busybox:- a file contains a set of unix tools which usually not comes with system pre installed and it is mostly important thing for a root user

Thanks to dhlalit11 for answering the question, but something like this can easily be answered by searching this forum or even a quick Google search.