Text-to-Speech (TTS)
Students who REALLY need to improve their pronunciation may benefit from bots reading text (text-to-speech tools). While intonation may be inaccurate and sound rather artificial, by and large, the pronunciation of sounds tends to be correct. These are some free, acceptable text-to-speech (TTS) tools:
Fliki- Creates subtitled videos and podcasts from text (H/T @EliGozalo). You can see examples here and here.
Hey Gen- creates realistic-looking avatars that will read the text you input.