At mastodon.nl we honour opensource packages by adding their logo as an emoji.
Are there ones you are missing?
We recently added:

@synq
Some thirty years ago, Debian was the most amazing thing you could imagine.
Since Eelco Dolstra's thesis some twenty years ago, we know better (or so I should hope!).
I know that Mastodon isn't available in GNU Guix just yet, as it is not (yet) bootstrappable. That is to say, the only way to build Mastodon is by using binary blobs during the build.
If anyone is interested in making Mastondon available in GNU Guix and thus making it truly bootstrappable, please do reach out to me.
I am convinced that we'll reach this point eventually, whenever we find a pulling force to make this happen it might speed up things.
@thegarbagebird @synq I have lots, but I'm not sure they'd fit with anyone wanting seriousness.
Arch
GNU
Ubuntu
ElementaryOS
Elementary
Gentoo
Tux
etc
we would love to add all, but I am especially interested in the ones our users will actually use of course. 😎
Can't see the site, but have you got clamtk/clamav, qgis?