An extension adding Vim-like bindings to Google Chrome.
As of April 23, 2020, the last update to GitHub was January 29, 2019, over a year ago. The most similar alternative is Surfingkeys (https://github.com/brookhong/Surfingkeys) or a fork of cVim, vb4c (https://github.com/dcchambers/vb4c).
Upon pressing G, Keys for Safari generates & renders shortcuts for every clickable element on the page. It's a much more beautiful and simple alternative to apps that just display a little yellow tag anywhere without much thought to user experience.
Mouseless Browsing (MLB) enables you to browse the web entirely with the keyboard. The basic principle is to add small boxes with unique ids behind every link and/or form element. You just have to type in the id to trigger the corresponding action i.e.