Full clones of package repos, basically a cache, maintained by Pkg.
Precompile *.ji files for packages.
Directory created and maintained by GitHub - JuliaPy/Conda.jl: Conda managing Julia binary dependencies.
Default directory used when you Pkg.develop a package.
Default package environments, like v1.0, v1.1.
REPL history, and some Pkg/Manifest usage.
Packages, maintained by Pkg, don’t touch.
Some config for GitHub - JuliaLang/IJulia.jl: Julia kernel for Jupyter.
Package registries.
Not sure what you mean with this.