https://obsproject.com/forum/resources/speechchat-for-twitch-youtube-mixer-etc.372/updates
Semi-free - SpeechChat (for Twitch, Youtube, Mixer, etc...) - Updates | OBS Forums
for twitchsemifree
https://www.speechchat.com/
SpeechChat
A web based chat client for Twitch and Youtube with text to speech.