Software I Use
My favorite markup language is LaTeX, which I use to make presentations and other types of documents.
For quick notes and short reports, I use Markdown and R Markdown. The simple syntax of R Markdown enables quick typesetting, at the cost of the more advanced features from LaTex.
I prefer to manage most things via the command line. When working on machines running windows, I use powershell. For Linux machines, I have experience with bash, fish, but currently use mksh.