One project I use on a daily basis that isn't well known (and is by a Chinese developer) is Vimium C (https://github.com/gdh1995/vimium-c). It has similar functionality to Vimium, cVim, Vimperator, Pentadactyl and the like—browser navigation using vim-like shortcuts. Vimium C is quite customizable, offers great functionality, and the developer seems quite responsive to issues. The code is written in TypeScript and I found it easy to read. Highly recommended.