[donio]

A couple more native X11 client implementations:

Common Lisp: https://github.com/sharplispers/clx

Go: https://github.com/BurntSushi/xgb

Any others?

(Looking for implementations of the X11 protocol in $LANGUAGE, not bindings to the C Xlib)

[donio]

One more that I use:

Emacs Lisp: https://github.com/ch11ng/xelb