Hey, I've hacked together some functions to recreate the vimium functionality inside of EWW. Sadly I never had interest into making this into a package. (Also there are some quirks/bugs that would need to be fleshed out but works fine for me most of the time.)
Anyone interested in turning it into one? You can copy and pasta the code as a starting point, and all the glory will be yours to release :)
Link: [https://github.com/gopar/.emacs.d#eww](https://github.com/gopar/.emacs.d#eww)
Vimium Plugin: [https://vimium.github.io/](https://vimium.github.io/)