CLI intro (Unix Command Line Introduction)

SC-IM (spreadsheets in terminal)

Tmux (a terminal multiplex)

Syncthing (P2P, free & open-source Dropbox alternative)

Emacs (text editor)

LibreOffice Calc (a nicer & better alternative to excel)

Quarto (open-source scientific and technical publishing system)

Org-mode

Latex (academic journaling)

Typst (a better Latex alternative)

NixOS

FreeBSD

OpenBSD

QubesOS