Even after years Phoenix does not have “awesome” list. The one I found have only 35 items:
https://github.com/droptheplot/awesome-phoenix

I guess there is not much projects in Hologram especially since comparing to Phoenix it’s relatively new, did not had a stable (usually 1.0.0 in semantic versioning) release and does not have any generators yet.

There is one repository, but it’s not open source yet:

That’s said the most important part was shared on the forum:

I may be wrong, but we would need to wait a long time before we would be able to have a good “awesome” list of Hologram repositories. For now we are mostly based on the docs and other things @bartblast shares with us. Please look that the Roadmap have lots of points and all of them would need to be documented. I’m sure that expect me many people are looking for even a few features …

Look that without for example JS Interop and related planned features we are a bit limited especially if someone want to integrate Hologram with frontend libraries. Without a stable API for this we can forgot about a Leaflet-based apps for example as nobody would really do that in plan Hologram if the same could be achieved in other web frameworks. For sure there may and most probably are some workarounds, but it’s not the point. To work on a real world project people rather expects a clean and feature-complete solution.