ZSST - ZLG's Simple Stream Timer
ZSST is ZLG's Simple Stream Timer. It's a Browser Source that you configure, then copy the URL into your Browser Source in OBS, size to your liking, and style it with CSS!
To use it, click the "Live Demo" link above or open the make_timer.html file,
then follow the instructions, and copy the resulting URL when you click "Make My
Timer!"