Vimium - The Hacker's Browser.
hunt-n-peck - Simple vimium/vimperator style navigation for Windows applications based on the UI Automation...
Vieb - Browse the web with Vim-bindings
Vimac - Like Vimium but for macOS.
cVim - An extension adding Vim-like bindings to Google Chrome.
Tridactyl - Replace Firefox's default control mechanism with one modelled on the one true editor, Vim.