Keyboard: OpenBoard (works great, support anonymous mode, my layout, emojis, paste, move cursor using finger over space button, longer deletes using finger over backspace)
Music Player: Odyssey (I don't rely on ID3 tags but directory structure instead - there is too little of those players who use it)
Music Player: ViMusic (FOSS interface to Youtube Music)
Music Player: RadioDroid (for online radio stations)