Sure. I didn't want to engage in self-promotion, but since you asked, here's the website and source code. There is an installer, but it's kind of old. I suggest installing AutoHotkey itself, then download the JKLmouse.ahk and JKLmouse.ico files from GitHub, and put a shortcut to the .ahk in your Startup folder.

https://www.jklmouse.com/

https://github.com/geary/jklmouse/tree/master/AutoHotkey/Sou...

One thing to note is that I wrote this to use on my ThinkPads, which have physical mouse buttons. On a laptop where the touchpad itself is the mouse button, it may be difficult to avoid nudging the mouse position when you click.

I've been thinking about adding support for using other keys as "mouse buttons", but haven't done anything about it yet.

This is really cool. It's like the Mouse feature if QMK but works with any keyboard!