Mine has not changed too much from last year:

os: OpenBSD
wm: shod
~
music: mpv + mpc + xprompt
video: mpv + youtube-dl
file manager: lf + coreutils + tree + fmutils
irc client: hexchat
terminal emulator: xterm
shell: ksh
system monitor: some scripts with xnotify
editor: vim
writer: heirloom troff
pdf viewer: zathura
screenshot: maim
image viewer: sxiv (I want to fork sxiv and make it into a file browser with thumbnails)
wallpaper: feh
mail client: mutt
compositor: none
web: firefox/dillo
other/fun: newsboat