Keynav is good but warpd [1] offers all of keynav's features and more (and on Windows, an equivalent of warpd is mousemaster [2]). They not only implement dicho

Keynav is good but warpd [1] offers all of keynav's features and more (and on Windows, an equivalent of warpd is mousemaster [2]). They not only implement dichotomic splitting but the hint grid too. And they're both FOSS software as well. [1] https://github.com/rvaiya/warpd https://github.com/rvaiya/warpd [2] https://github.com/petoncle/mousemaster https://github.com/petoncle/mousemaster