I also enjoyed using https://github.com/rvaiya/warpd on my mac. But was hit with few bugs, where the pointer used to get stuck. Had to keep restarting. But still a nice program to ditch mouse.
And for Windows, my https://github.com/EsportToys/TPMouse was inspired by warpd itself but more focused on making direct cursor motion more usable using momentum.
I use it all the time, on Ubuntu. Works well, and definitely avoids many keyboard-mouse back-and-forths for 90% of my single clicks.