Use as you wish. Any code / scripts I have borrowed from other places should be credited in comments in the file. I currently use a [fork of DWM](https://git.jonathanh.co.uk/jab2870/dwm) as my window manager on Arch Linux, however, I don't think there is anything that is Arch specific.
My primary editor is ~~vim~~ neovim, who's config is in a submodule because I often need to deploy my vim configuration but don't need to download all of my dotfiles. The main reason I switched from Vim to NeoVim was to experiment [Deoplete](https://github.com/Shougo/deoplete.nvim).
My email client of choice is NeoMutt, although there are a plethora of tools that go along with it. If you are interested in how it all interlocks, I wrote a blog post about it: <https://jonathanh.co.uk/blog/mutt-setup.html>
I use [GNU Stow](https://www.gnu.org/software/stow/) to deploy my dotfiles. There is a helper script in the root of this directory called install.sh that runs the necessary stow commands.
Each folder contains the configuration related to a program / tool. In most cases, this folder is stowed meaning all of it's contents are symlinked to the same place in my $HOME directory. However, there are instances (only shells/zsh at the moment) when I don't want the whole directory to be symlinked. If the directory contains a sub-directory called `STOW`, only the `STOW` directory is stowed.
The folder `LEGACY` is for things that I no longer use but might be of interest if you are the sort of person who likes looking at other people's dotfiles.
The folder `NOSTOW` is for things that I don't manage with stow. This includes a submodule for my DWM fork and configuration files that live outside my home directory.