Git from the Bottom Up
A tutorial/reference that covers a lot of detail about git.
"As someone who’s spent an unnecessary amount of time trying different approaches to window management in Emacs over the decades, I decided to summarize them here. Almanac might be overstating it a bit – this is a primer to and a collection of window management resources and tips."
A pretty comprehensive guide to all the different ways you can manage windows (in the Emacs sense) in Emacs.