You didn't mention which sites you are already aware of, but you can filter [The Boston Calendar](https://www.thebostoncalendar.com/?tags%5B%5D=FREE) to only view free events.

That's the one I was looking for.  I don't know why my mind went so blank.  Thanks

[Boston events calendar](https://www.thebostoncalendar.com)

Hi.  I was thinking about the "Portland Maine Cheat Sheet" [https://www.portlandcheatsheet.com/](https://www.portlandcheatsheet.com/)

Is there a similar site that organizes free events in Boston.  I know there are a ton of sites that list events but I've not seen something quite like the Portland one and was curious if there isn't one or if I'm just blind and missed it.

Thanks

Free Boston Events