For reference, here’s a few incomplete lists:
- https://en.wikipedia.org/wiki/List_of_computing_mascots
- https://www.linuxfoundation.org/blog/open-source-symbolism-exploring-the-stories-behind-linux-foundation-project-mascots-and-logos
- https://online.supertuxkart.net/addons.php?type=karts
A few that I don’t see in the lists are:
- llvm dragon: https://llvm.org/Logo.html
- buildah pug: https://buildah.io/
- podman seal: https://podman.io/
- openSUSE gecko: https://en.opensuse.org/openSUSE:Artwork_brand#Logo
Otters are part of the “lutrinae” subfamily, so they’re both based on the same naming root.