iFrame Google Calendar Embed
Free
I modified the width. It copies as width="800". I modified this to be width=100% to make it responsive. I also removed the dark gray outline that appears as "border:solid 1px #777" and replaced it with "border:none".
The note of "busy" rather than the name of the event is due to the "public" settings. I can choose which it shows.
Google Calendar Wix App
This is free as well but doesn't seem much better than the embed above.
Here you can choose to have a monthly or weekly view. You can modify the height/width, though it seems the width is what is responsive and the height can chop off if the embed window is not big enough.
Boom Event Calendar
10 Events Free. Paid upgrade. This has the highest rating of 4.5 stars with over 500 reviews. Currently on discount for 50% off but normally is $7/month if paid annually, $10/month if monthly.
There are a ton of integrations. Google is one of them, displayed below (again, ten event max without upgrade). But it can pair with Wix Events to display those here too. And many others. I'll put a screenshot below of all the integrations and the layout options.
Events Calendar
10 Events Free. Paid upgrade. This has a rating of 3.5 stars with 255 reviews. $8/month if paid for a year, $10/month otherwise.
I've put the Settings screenshots below because it is pretty customizable. It will also show Wix Events. Also doe some reason I was able to see the option to get this for a year for free?? But I did not see that on the other site we initially put this on.
Others
All others are lower ratings and don't do anything other than show the Google calendar embed. If Jen is more familiar with others, that's great, but from what I can tell, there's not much happening in this arena.