Warning: This project has been deprecated because of the recently created Runtime Fee, showing that Unity Technologies can and will put restrictions on the developers that use Unity, and as an open-source developer I don't want to give more tools and help an environment that is outside the community control as Unity is.
Skyer Builder is a tool created for the Unity Game Engine that facilitates the process of building the same project for multiple platforms.
Skyer Builder does not depend on dependencies or external tools, for the Skyer Engine to work it uses the Unity BuildPipeline itself available natively in Unity, so you don't need to worry about dependencies or licenses besides Skyer itself.
There are 3 ways to use Skyer, either through the window in Editor (located at Window > Skyer Builder), through the command line or directly through the code using scripts.
Currently no official source explaining how Skyer Builder can be used from the command line or scripts.
Although Skyer Builder can be modified, the most recommended so far is to open an Issue on GitHub asking for support, while there is no documentation explaining how to add custom targets in Skyer.
You can install it from Unity Asset Store or directly from the repository on GitHub, downloading the Unity Package from here or adding a package from the git URL "https://github.com/nashiradeer/skyer-builder.git" in the Unity Package Manager.
The Skyer Builder is created and maintained by Nashira Deer, licensed with the MIT License to anyone who can use, modify and distribute your Skyer Builder.
