Hi, I got something to show 
What?
If you have ever wanted to customize your Open edX instance and worked with MFEs, frontend plugins and that sort of thing, I have something that might interest you.
The Open edX Frontend Plugin Slots Browser.
This collects the information about all the plugin slots available in all of the MFEs under the openedx Github org and puts it in a single place. It automatically updates everyday with the latest info.
Why?
It was created mostly to satisfy my curiosity. Initially, I was just trying to get some metrics, like the ones that you see on the landing page. But as the flight I was waiting for got delayed for the second time, I just made it into a full site, which can host all the data in a neat browse-able way.
I am not sure how useful it would be for the community, but I am planning to include the backend parts - openedx-filters & openedx-events as well, and finally have a couple of guides on customizing Open edX, and links to existing documentation & best-practices.
Thank you for checking it out.