On android, GrapheneOS, AntennaPod and Tempo are probably my top ones. On my desktop, Firefox, tmux, mpd, ncmpcpp, gonic, neomutt, qbittorrent, weechat, mc, btop, Lagrange and emacs probably round things out for me outside of base OS stuff. OS side, my desktop has Arch Linux and my laptop runs OpenBSD. Bitwarden across platforms.
MPD and whatever front end you like for what’s the best music player going, imo. You can tweak your player to your liking, MPD will play any format supported by ffmpeg, has some forks for further functionality, handles big libraries like a champ (I’m sitting at 54,758 files in mine without issue), can serve music streams online and be remotely controlled, and even has ridiculous features like the ability to handle gopher urls for media/streaming.
It’s also as lightweight as you want it to be. MPD+ncmpcpp for playback use a whopping 66MB of ram for me.