What Are Some Good Publicly Available Real-time Data Sources?

This is a cross-post from r/dataengineering via recommendation from the comments there.

I am trying to curate and crowdsource a list of real-time datasets and sources into an “Awesome List” in a GitHub repo – https://github.com/bytewax/awesome-public-real-time-datasets. It is something I found difficult when building hobby projects or trying to learn about streaming data.

If you have any recommendations please share a link in the comments or open a PR in the repo :).