Yet another in the long line of "things I made but nobody noticed and then years later someone did better": https://flatgithub.com/
Might start a dataset of my failed and superceded projects.
@Floppy What was your angle? I'm working on something kinda similar but for a different use case https://github.com/DataTig/DataTig https://datatig.readthedocs.io/en/latest/
@jarofgreen https://floppy.org.uk/blog/2014/05/23/csvhub-github-diffs-for-csv-files/ was the thing, but we did a bunch of other stuff in that area like csvlint.io and octopub.io too.
Open social media for the UK