pdf reader

• mupdf

image viewers

• display(imagemagick)
• feh
• nsxiv

file managers

• lf
• spacefm

music players

• quodlibet
• cmus
• mpd(server)
• mpc(console client)
• ncmpcpp(ncurses client)
• pms (ncurses, fzf search)

movie players

• plex server
• mpv
• vlc

torrent clients

• qbittorrent(offers search plugins)
• delugee(server-client, web client)
• transmision(cli)

email clients

• neomutt(tui)
• claws mail(gui)

cli tools

• surfraw - search engines input from cli
• ytfzf -
• pv - pipe viewer